changed sig*.c to *~.c

svn path=/trunk/externals/iemlib/; revision=6232

16 files changed, 0 insertions, 4170 deletions

diff --git a/src/iemlib1/sigFIR.c b/src/iemlib1/sigFIR.c
deleted file mode 100644
index 5827ab1..0000000
--- a/src/iemlib1/sigFIR.c
+++ /dev/null
@@ -1,177 +0,0 @@
-/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
-* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
-
-iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
-
-#ifdef _MSC_VER
-#pragma warning( disable : 4244 )
-#pragma warning( disable : 4305 )
-#endif
-
-
-#include "m_pd.h"
-#include "iemlib.h"
-#include <math.h>
-#include <stdio.h>
-#include <string.h>
-
-
-/* ---------- FIR~ - FIR-filter with table-coef ----------- */
-
-typedef struct sigFIR
-{
-  t_object  x_obj;
-  float     *x_coef_beg;
-  float     *x_history_beg;
-  int       x_rw_index;
-  int       x_fir_order;
-  t_symbol  *x_table_name;
-  float     x_msi;
-} t_sigFIR;
-
-t_class *sigFIR_class;
-
-static t_int *sigFIR_perform(t_int *w)
-{
-  float *in = (float *)(w[1]);
-  float *out = (float *)(w[2]);
-  t_sigFIR *x = (t_sigFIR *)(w[3]);
-  int n = (t_int)(w[4]);
-  int rw_index = x->x_rw_index;
-  int i, j;
-  int order = x->x_fir_order;
-  int ord16 = order / 16;
-  float sum=0.0f;
-  float *coef = x->x_coef_beg;
-  float *write_hist1=x->x_history_beg;
-  float *write_hist2;
-  float *read_hist;
-  float *coef_vec;
-  float *hist_vec;
-  
-  if(!coef)
-    goto sigFIRperfzero;
-  
-  write_hist1 = x->x_history_beg;
-  write_hist2 = write_hist1 + order;
-  read_hist = write_hist2;
-  
-  for(i=0; i<n; i++)
-  {
-    write_hist1[rw_index] = in[i];
-    write_hist2[rw_index] = in[i];
-    
-    sum = 0.0f;
-    coef_vec = coef;
-    hist_vec = &read_hist[rw_index];
-    for(j=0; j<ord16; j++)
-    {
-      sum += coef_vec[0] * hist_vec[0];
-      sum += coef_vec[1] * hist_vec[-1];
-      sum += coef_vec[2] * hist_vec[-2];
-      sum += coef_vec[3] * hist_vec[-3];
-      sum += coef_vec[4] * hist_vec[-4];
-      sum += coef_vec[5] * hist_vec[-5];
-      sum += coef_vec[6] * hist_vec[-6];
-      sum += coef_vec[7] * hist_vec[-7];
-      sum += coef_vec[8] * hist_vec[-8];
-      sum += coef_vec[9] * hist_vec[-9];
-      sum += coef_vec[10] * hist_vec[-10];
-      sum += coef_vec[11] * hist_vec[-11];
-      sum += coef_vec[12] * hist_vec[-12];
-      sum += coef_vec[13] * hist_vec[-13];
-      sum += coef_vec[14] * hist_vec[-14];
-      sum += coef_vec[15] * hist_vec[-15];
-      coef_vec += 16;
-      hist_vec -= 16;
-    }
-    for(j=ord16*16; j<order; j++)
-    {
-      sum += coef[j] * read_hist[rw_index-j];
-    }
-    out[i] = sum;
-    
-    rw_index++;
-    if(rw_index >= order)
-      rw_index -= order;
-  }
-  
-  x->x_rw_index = rw_index;
-  return(w+5);
-  
-sigFIRperfzero:
-  
-  while(n--)
-    *out++ = 0.0f;
-  return(w+5);
-}
-
-void sigFIR_set(t_sigFIR *x, t_symbol *table_name, t_floatarg forder)
-{
-  t_garray *ga;
-  int table_size;
-  int order = (int)forder;
-  
-  x->x_table_name = table_name;
-  if(!(ga = (t_garray *)pd_findbyclass(x->x_table_name, garray_class)))
-  {
-    if(*table_name->s_name)
-      error("FIR~: %s: no such table~", x->x_table_name->s_name);
-    x->x_coef_beg = 0;
-  }
-  else if(!garray_getfloatarray(ga, &table_size, &x->x_coef_beg))
-  {
-    error("%s: bad template for FIR~", x->x_table_name->s_name);
-    x->x_coef_beg = 0;
-  }
-  else if(table_size < order)
-  {
-    error("FIR~: tablesize %d < order %d !!!!", table_size, order);
-    x->x_coef_beg = 0;
-  }
-  else
-    garray_usedindsp(ga);
-  x->x_rw_index = 0;
-  if(order > x->x_fir_order)/* resize */
-    x->x_history_beg =  (float *)resizebytes(x->x_history_beg, 2*x->x_fir_order*sizeof(float), 2*order*sizeof(float));
-  x->x_fir_order = order;
-}
-
-static void sigFIR_dsp(t_sigFIR *x, t_signal **sp)
-{
-  sigFIR_set(x, x->x_table_name, x->x_fir_order);
-  dsp_add(sigFIR_perform, 4, sp[0]->s_vec, sp[1]->s_vec, x, sp[0]->s_n);
-}
-
-static void *sigFIR_new(t_symbol *ref, t_floatarg np)
-{
-  t_sigFIR *x = (t_sigFIR *)pd_new(sigFIR_class);
-  
-  outlet_new(&x->x_obj, &s_signal);
-  x->x_msi = 0;
-  x->x_table_name = ref;
-  x->x_coef_beg = 0;
-  if((int)np < 1)
-    np = 1.0;
-  x->x_fir_order = (int)np;
-  x->x_history_beg = (float *)getbytes((2*x->x_fir_order)*sizeof(float));
-  x->x_rw_index = 0;
-  return(x);
-}
-
-static void sigFIR_free(t_sigFIR *x)
-{
-  if(x->x_history_beg)
-    freebytes(x->x_history_beg, (2*x->x_fir_order)*sizeof(float));
-}
-
-void sigFIR_setup(void)
-{
-  sigFIR_class = class_new(gensym("FIR~"), (t_newmethod)sigFIR_new,
-    (t_method)sigFIR_free, sizeof(t_sigFIR), 0, A_DEFSYM, A_DEFFLOAT, 0);
-  CLASS_MAINSIGNALIN(sigFIR_class, t_sigFIR, x_msi);
-  class_addmethod(sigFIR_class, (t_method)sigFIR_dsp, gensym("dsp"), 0);
-  class_addmethod(sigFIR_class, (t_method)sigFIR_set,
-    gensym("set"), A_SYMBOL, A_FLOAT, 0);
-  class_sethelpsymbol(sigFIR_class, gensym("iemhelp/help-FIR~"));
-}
diff --git a/src/iemlib1/sigfilter.c b/src/iemlib1/sigfilter.c
deleted file mode 100644
index 68df058..0000000
--- a/src/iemlib1/sigfilter.c
+++ /dev/null
@@ -1,822 +0,0 @@
-/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
-* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
-
-iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
-
-#ifdef _MSC_VER
-#pragma warning( disable : 4244 )
-#pragma warning( disable : 4305 )
-#endif
-
-
-#include "m_pd.h"
-#include "iemlib.h"
-#include <math.h>
-#include <stdio.h>
-#include <string.h>
-
-
-/* ---------- filter~ - slow dynamic filter-kernel 1. and 2. order ----------- */
-
-typedef struct sigfilter
-{
-  t_object  x_obj;
-  float     wn1;
-  float     wn2;
-  float     a0;
-  float     a1;
-  float     a2;
-  float     b1;
-  float     b2;
-  float     sr;
-  float     cur_f;
-  float     cur_l;
-  float     cur_a;
-  float     cur_b;
-  float     delta_f;
-  float     delta_a;
-  float     delta_b;
-  float     end_f;
-  float     end_a;
-  float     end_b;
-  float     ticks_per_interpol_time;
-  float     rcp_ticks;
-  float     interpol_time;
-  int       ticks;
-  int       counter_f;
-  int       counter_a;
-  int       counter_b;
-  int       inv;
-  int       hp;
-  int       first_order;
-  int       event_mask;
-  void      (*calc)();
-  void      *x_debug_outlet;
-  t_atom    x_at[5];
-  float     x_msi;
-} t_sigfilter;
-
-t_class *sigfilter_class;
-
-static void sigfilter_snafu(t_sigfilter *x)
-{
-  
-}
-
-static void sigfilter_lp1(t_sigfilter *x)
-{
-  float al;
-  
-  al = x->cur_a * x->cur_l;
-  x->a0 = 1.0f/(1.0f + al);
-  x->a1 = x->a0;
-  x->b1 = (al - 1.0f)*x->a0;
-}
-
-static void sigfilter_lp2(t_sigfilter *x)
-{
-  float l, al, bl2, rcp;
-  
-  l = x->cur_l;
-  al = l*x->cur_a;
-  bl2 = l*l*x->cur_b + 1.0f;
-  rcp = 1.0f/(al + bl2);
-  x->a0 = rcp;
-  x->a1 = 2.0f*rcp;
-  x->a2 = x->a0;
-  x->b1 = rcp*2.0f*(bl2 - 2.0f);
-  x->b2 = rcp*(al - bl2);
-}
-
-static void sigfilter_hp1(t_sigfilter *x)
-{
-  float al, rcp;
-  
-  al = x->cur_a * x->cur_l;
-  rcp = 1.0f/(1.0f + al);
-  x->a0 = rcp*al;
-  x->a1 = -x->a0;
-  x->b1 = rcp*(al - 1.0f);
-}
-
-static void sigfilter_hp2(t_sigfilter *x)
-{
-  float l, al, bl2, rcp;
-  
-  l = x->cur_l;
-  bl2 = l*l*x->cur_b + 1.0f;
-  al = l*x->cur_a;
-  rcp = 1.0f/(al + bl2);
-  x->a0 = rcp*(bl2 - 1.0f);
-  x->a1 = -2.0f*x->a0;
-  x->a2 = x->a0;
-  x->b1 = rcp*2.0f*(bl2 - 2.0f);
-  x->b2 = rcp*(al - bl2);
-}
-
-static void sigfilter_rp2(t_sigfilter *x)
-{
-  float l, al, l2, rcp;
-  
-  l = x->cur_l;
-  l2 = l*l + 1.0f;
-  al = l*x->cur_a;
-  rcp = 1.0f/(al + l2);
-  x->a0 = rcp*l;
-  x->a2 = -x->a0;
-  x->b1 = rcp*2.0f*(l2 - 2.0f);
-  x->b2 = rcp*(al - l2);
-}
-
-static void sigfilter_bp2(t_sigfilter *x)
-{
-  float l, al, l2, rcp;
-  
-  l = x->cur_l;
-  l2 = l*l + 1.0f;
-  al = l*x->cur_a;
-  rcp = 1.0f/(al + l2);
-  x->a0 = rcp*al;
-  x->a2 = -x->a0;
-  x->b1 = rcp*2.0f*(l2 - 2.0f);
-  x->b2 = rcp*(al - l2);
-}
-
-static void sigfilter_bs2(t_sigfilter *x)
-{
-  float l, al, l2, rcp;
-  
-  l = x->cur_l;
-  l2 = l*l + 1.0f;
-  al = l*x->cur_a;
-  rcp = 1.0f/(al + l2);
-  x->a0 = rcp*l2;
-  x->a1 = rcp*2.0f*(2.0f - l2);
-  x->a2 = x->a0;
-  x->b1 = -x->a1;
-  x->b2 = rcp*(al - l2);
-}
-
-static void sigfilter_rpw2(t_sigfilter *x)
-{
-  float l, al, l2, rcp;
-  
-  l = x->cur_l;
-  l2 = l*l + 1.0f;
-  al = l*x->cur_a/x->cur_f;
-  rcp = 1.0f/(al + l2);
-  x->a0 = rcp*l;
-  x->a2 = -x->a0;
-  x->b1 = rcp*2.0f*(l2 - 2.0f);
-  x->b2 = rcp*(al - l2);
-}
-
-static void sigfilter_bpw2(t_sigfilter *x)
-{
-  float l, al, l2, rcp;
-  
-  l = x->cur_l;
-  l2 = l*l + 1.0f;
-  al = l*x->cur_a/x->cur_f;
-  rcp = 1.0f/(al + l2);
-  x->a0 = rcp*al;
-  x->a2 = -x->a0;
-  x->b1 = rcp*2.0f*(l2 - 2.0f);
-  x->b2 = rcp*(al - l2);
-}
-
-static void sigfilter_bsw2(t_sigfilter *x)
-{
-  float l, al, l2, rcp;
-  
-  l = x->cur_l;
-  l2 = l*l + 1.0f;
-  al = l*x->cur_a/x->cur_f;
-  rcp = 1.0f/(al + l2);
-  x->a0 = rcp*l2;
-  x->a1 = rcp*2.0f*(2.0f - l2);
-  x->a2 = x->a0;
-  x->b1 = -x->a1;
-  x->b2 = rcp*(al - l2);
-}
-
-static void sigfilter_ap1(t_sigfilter *x)
-{
-  float al;
-  
-  al = x->cur_a * x->cur_l;
-  x->a0 = (1.0f - al)/(1.0f + al);
-  x->b1 = -x->a0;
-}
-
-static void sigfilter_ap2(t_sigfilter *x)
-{
-  float l, al, bl2, rcp;
-  
-  l = x->cur_l;
-  bl2 = l*l*x->cur_b + 1.0f;
-  al = l*x->cur_a;
-  rcp = 1.0f/(al + bl2);
-  x->a1 = rcp*2.0f*(2.0f - bl2);
-  x->a0 = rcp*(bl2 - al);
-  x->b1 = -x->a1;
-  x->b2 = -x->a0;
-}
-
-/*static void sigfilter_bp2(t_sigfilter *x)
-{
-float l, al, l2, rcp;
-
-  l = x->cur_l;
-  l2 = l*l + 1.0;
-  al = l*x->cur_a;
-  rcp = 1.0f/(al + l2);
-  x->a0 = rcp*al;
-  x->a2 = -x->a0;
-  x->b1 = rcp*2.0f*(2.0f - l2);
-  x->b2 = rcp*(l2 - al);
-}*/
-
-static void sigfilter_dsp_tick(t_sigfilter *x)
-{
-  if(x->event_mask)
-  {
-    if(x->counter_f)
-    {
-      float l, si, co;
-      
-      if(x->counter_f <= 1)
-      {
-        x->cur_f = x->end_f;
-        x->counter_f = 0;
-        x->event_mask &= 6;/*set event_mask_bit 0 = 0*/
-      }
-      else
-      {
-        x->counter_f--;
-        x->cur_f *= x->delta_f;
-      }
-      l = x->cur_f * x->sr;
-      if(l < 1.0e-20f)
-        x->cur_l = 1.0e20f;
-      else if(l > 1.57079632f)
-        x->cur_l = 0.0f;
-      else
-      {
-        si = sin(l);
-        co = cos(l);
-        x->cur_l = co/si;
-      }
-    }
-    if(x->counter_a)
-    {
-      if(x->counter_a <= 1)
-      {
-        x->cur_a = x->end_a;
-        x->counter_a = 0;
-        x->event_mask &= 5;/*set event_mask_bit 1 = 0*/
-      }
-      else
-      {
-        x->counter_a--;
-        x->cur_a *= x->delta_a;
-      }
-    }
-    if(x->counter_b)
-    {
-      if(x->counter_b <= 1)
-      {
-        x->cur_b = x->end_b;
-        x->counter_b = 0;
-        x->event_mask &= 3;/*set event_mask_bit 2 = 0*/
-      }
-      else
-      {
-        x->counter_b--;
-        x->cur_b *= x->delta_b;
-      }
-    }
-    
-    (*(x->calc))(x);
-    
-    /* stability check */
-    if(x->first_order)
-    {
-      if(x->b1 <= -0.9999998f)
-        x->b1 = -0.9999998f;
-      else if(x->b1 >= 0.9999998f)
-        x->b1 = 0.9999998f;
-    }
-    else
-    {
-      float discriminant = x->b1 * x->b1 + 4.0f * x->b2;
-      
-      if(x->b1 <= -1.9999996f)
-        x->b1 = -1.9999996f;
-      else if(x->b1 >= 1.9999996f)
-        x->b1 = 1.9999996f;
-      
-      if(x->b2 <= -0.9999998f)
-        x->b2 = -0.9999998f;
-      else if(x->b2 >= 0.9999998f)
-        x->b2 = 0.9999998f;
-      
-      if(discriminant >= 0.0f)
-      {
-        if(0.9999998f - x->b1 - x->b2 < 0.0f)
-          x->b2 = 0.9999998f - x->b1;
-        if(0.9999998f + x->b1 - x->b2 < 0.0f)
-          x->b2 = 0.9999998f + x->b1;
-      }
-    }
-  }
-}
-
-static t_int *sigfilter_perform_2o(t_int *w)
-{
-  float *in = (float *)(w[1]);
-  float *out = (float *)(w[2]);
-  t_sigfilter *x = (t_sigfilter *)(w[3]);
-  int i, n = (t_int)(w[4]);
-  float wn0, wn1=x->wn1, wn2=x->wn2;
-  float a0=x->a0, a1=x->a1, a2=x->a2;
-  float b1=x->b1, b2=x->b2;
-  
-  sigfilter_dsp_tick(x);
-  for(i=0; i<n; i++)
-  {
-    wn0 = *in++ + b1*wn1 + b2*wn2;
-    *out++ = a0*wn0 + a1*wn1 + a2*wn2;
-    wn2 = wn1;
-    wn1 = wn0;
-  }
-  /* NAN protect */
-  if(IEM_DENORMAL(wn2))
-    wn2 = 0.0f;
-  if(IEM_DENORMAL(wn1))
-    wn1 = 0.0f;
-  
-  x->wn1 = wn1;
-  x->wn2 = wn2;
-  return(w+5);
-}
-/*   yn0 = *out;
-xn0 = *in;
-*************
-yn0 = a0*xn0 + a1*xn1 + a2*xn2 + b1*yn1 + b2*yn2;
-yn2 = yn1;
-yn1 = yn0;
-xn2 = xn1;
-xn1 = xn0;
-*************************
-y/x = (a0 + a1*z-1 + a2*z-2)/(1 - b1*z-1 - b2*z-2);*/
-
-static t_int *sigfilter_perf8_2o(t_int *w)
-{
-  float *in = (float *)(w[1]);
-  float *out = (float *)(w[2]);
-  t_sigfilter *x = (t_sigfilter *)(w[3]);
-  int i, n = (t_int)(w[4]);
-  float wn[10];
-  float a0=x->a0, a1=x->a1, a2=x->a2;
-  float b1=x->b1, b2=x->b2;
-  
-  sigfilter_dsp_tick(x);
-  wn[0] = x->wn2;
-  wn[1] = x->wn1;
-  for(i=0; i<n; i+=8, in+=8, out+=8)
-  {
-    wn[2] = in[0] + b1*wn[1] + b2*wn[0];
-    out[0] = a0*wn[2] + a1*wn[1] + a2*wn[0];
-    wn[3] = in[1] + b1*wn[2] + b2*wn[1];
-    out[1] = a0*wn[3] + a1*wn[2] + a2*wn[1];
-    wn[4] = in[2] + b1*wn[3] + b2*wn[2];
-    out[2] = a0*wn[4] + a1*wn[3] + a2*wn[2];
-    wn[5] = in[3] + b1*wn[4] + b2*wn[3];
-    out[3] = a0*wn[5] + a1*wn[4] + a2*wn[3];
-    wn[6] = in[4] + b1*wn[5] + b2*wn[4];
-    out[4] = a0*wn[6] + a1*wn[5] + a2*wn[4];
-    wn[7] = in[5] + b1*wn[6] + b2*wn[5];
-    out[5] = a0*wn[7] + a1*wn[6] + a2*wn[5];
-    wn[8] = in[6] + b1*wn[7] + b2*wn[6];
-    out[6] = a0*wn[8] + a1*wn[7] + a2*wn[6];
-    wn[9] = in[7] + b1*wn[8] + b2*wn[7];
-    out[7] = a0*wn[9] + a1*wn[8] + a2*wn[7];
-    wn[0] = wn[8];
-    wn[1] = wn[9];
-  }
-  /* NAN protect */
-  if(IEM_DENORMAL(wn[0]))
-    wn[0] = 0.0f;
-  if(IEM_DENORMAL(wn[1]))
-    wn[1] = 0.0f;
-  
-  x->wn1 = wn[1];
-  x->wn2 = wn[0];
-  return(w+5);
-}
-
-static t_int *sigfilter_perform_1o(t_int *w)
-{
-  float *in = (float *)(w[1]);
-  float *out = (float *)(w[2]);
-  t_sigfilter *x = (t_sigfilter *)(w[3]);
-  int i, n = (t_int)(w[4]);
-  float wn0, wn1=x->wn1;
-  float a0=x->a0, a1=x->a1;
-  float b1=x->b1;
-  
-  sigfilter_dsp_tick(x);
-  for(i=0; i<n; i++)
-  {
-    wn0 = *in++ + b1*wn1;
-    *out++ = a0*wn0 + a1*wn1;
-    wn1 = wn0;
-  }
-  /* NAN protect */
-  if(IEM_DENORMAL(wn1))
-    wn1 = 0.0f;
-  
-  x->wn1 = wn1;
-  return(w+5);
-}
-
-static t_int *sigfilter_perf8_1o(t_int *w)
-{
-  float *in = (float *)(w[1]);
-  float *out = (float *)(w[2]);
-  t_sigfilter *x = (t_sigfilter *)(w[3]);
-  int i, n = (t_int)(w[4]);
-  float wn[9];
-  float a0=x->a0, a1=x->a1;
-  float b1=x->b1;
-  
-  sigfilter_dsp_tick(x);
-  wn[0] = x->wn1;
-  for(i=0; i<n; i+=8, in+=8, out+=8)
-  {
-    wn[1] = in[0] + b1*wn[0];
-    out[0] = a0*wn[1] + a1*wn[0];
-    wn[2] = in[1] + b1*wn[1];
-    out[1] = a0*wn[2] + a1*wn[1];
-    wn[3] = in[2] + b1*wn[2];
-    out[2] = a0*wn[3] + a1*wn[2];
-    wn[4] = in[3] + b1*wn[3];
-    out[3] = a0*wn[4] + a1*wn[3];
-    wn[5] = in[4] + b1*wn[4];
-    out[4] = a0*wn[5] + a1*wn[4];
-    wn[6] = in[5] + b1*wn[5];
-    out[5] = a0*wn[6] + a1*wn[5];
-    wn[7] = in[6] + b1*wn[6];
-    out[6] = a0*wn[7] + a1*wn[6];
-    wn[8] = in[7] + b1*wn[7];
-    out[7] = a0*wn[8] + a1*wn[7];
-    wn[0] = wn[8];
-  }
-  /* NAN protect */
-  if(IEM_DENORMAL(wn[0]))
-    wn[0] = 0.0f;
-  
-  x->wn1 = wn[0];
-  return(w+5);
-}
-
-static void sigfilter_ft4(t_sigfilter *x, t_floatarg t)
-{
-  int i = (int)((x->ticks_per_interpol_time)*t+0.49999f);
-  
-  x->interpol_time = t;
-  if(i <= 0)
-  {
-    x->ticks = 1;
-    x->rcp_ticks = 1.0;
-  }
-  else
-  {
-    x->ticks = i;
-    x->rcp_ticks = 1.0 / (float)i;
-  }
-}
-
-static void sigfilter_ft3(t_sigfilter *x, t_floatarg b)
-{
-  if(b <= 0.0f)
-    b = 0.000001f;
-  if(x->hp)
-    b = 1.0 / b;
-  if(b != x->cur_b)
-  {
-    x->end_b = b;
-    x->counter_b = x->ticks;
-    x->delta_b = exp(log(b/x->cur_b)*x->rcp_ticks);
-    x->event_mask |= 4;/*set event_mask_bit 2 = 1*/
-  }
-}
-
-static void sigfilter_ft2(t_sigfilter *x, t_floatarg a)
-{
-  if(a <= 0.0f)
-    a = 0.000001f;
-  if(x->inv)
-    a = 1.0f / a;
-  if(x->hp)
-    a /= x->cur_b;
-  if(a != x->cur_a)
-  {
-    x->end_a = a;
-    x->counter_a = x->ticks;
-    x->delta_a = exp(log(a/x->cur_a)*x->rcp_ticks);
-    x->event_mask |= 2;/*set event_mask_bit 1 = 1*/
-  }
-}
-
-static void sigfilter_ft1(t_sigfilter *x, t_floatarg f)
-{
-  if(f <= 0.0f)
-    f = 0.000001f;
-  if(f != x->cur_f)
-  {
-    x->end_f = f;
-    x->counter_f = x->ticks;
-    x->delta_f = exp(log(f/x->cur_f)*x->rcp_ticks);
-    x->event_mask |= 1;/*set event_mask_bit 0 = 1*/
-  }
-}
-
-static void sigfilter_print(t_sigfilter *x)
-{
-  //  post("fb1 = %g, fb2 = %g, ff1 = %g, ff2 = %g, ff3 = %g", x->b1, x->b2, x->a0, x->a1, x->a2);
-  x->x_at[0].a_w.w_float = x->b1;
-  x->x_at[1].a_w.w_float = x->b2;
-  x->x_at[2].a_w.w_float = x->a0;
-  x->x_at[3].a_w.w_float = x->a1;
-  x->x_at[4].a_w.w_float = x->a2;
-  outlet_list(x->x_debug_outlet, &s_list, 5, x->x_at);
-}
-
-static void sigfilter_dsp(t_sigfilter *x, t_signal **sp)
-{
-  float si, co, f;
-  int i, n=(int)sp[0]->s_n;
-  
-  x->sr = 3.14159265358979323846f / (float)(sp[0]->s_sr);
-  x->ticks_per_interpol_time = 0.001f * (float)(sp[0]->s_sr) / (float)n;
-  i = (int)((x->ticks_per_interpol_time)*(x->interpol_time)+0.49999f);
-  if(i <= 0)
-  {
-    x->ticks = 1;
-    x->rcp_ticks = 1.0f;
-  }
-  else
-  {
-    x->ticks = i;
-    x->rcp_ticks = 1.0f / (float)i;
-  }
-  f = x->cur_f * x->sr;
-  if(f < 1.0e-20f)
-    x->cur_l = 1.0e20f;
-  else if(f > 1.57079632f)
-    x->cur_l = 0.0f;
-  else
-  {
-    si = sin(f);
-    co = cos(f);
-    x->cur_l = co/si;
-  }
-  if(x->first_order)
-  {
-    if(n&7)
-      dsp_add(sigfilter_perform_1o, 4, sp[0]->s_vec, sp[1]->s_vec, x, n);
-    else
-      dsp_add(sigfilter_perf8_1o, 4, sp[0]->s_vec, sp[1]->s_vec, x, n);
-  }
-  else
-  {
-    if(n&7)
-      dsp_add(sigfilter_perform_2o, 4, sp[0]->s_vec, sp[1]->s_vec, x, n);
-    else
-      dsp_add(sigfilter_perf8_2o, 4, sp[0]->s_vec, sp[1]->s_vec, x, n);
-  }
-}
-
-static void *sigfilter_new(t_symbol *s, int argc, t_atom *argv)
-{
-  t_sigfilter *x = (t_sigfilter *)pd_new(sigfilter_class);
-  char *filt_name;
-  int i;
-  float si, co, f=0.0f, a=0.0f, b=0.0f, interpol=0.0f;
-  t_symbol *filt_typ=gensym("");
-  
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft2"));
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft3"));
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft4"));
-  outlet_new(&x->x_obj, &s_signal);
-  x->x_debug_outlet = outlet_new(&x->x_obj, &s_list);
-  x->x_msi = 0.0f;
-  
-  x->x_at[0].a_type = A_FLOAT;
-  x->x_at[1].a_type = A_FLOAT;
-  x->x_at[2].a_type = A_FLOAT;
-  x->x_at[3].a_type = A_FLOAT;
-  x->x_at[4].a_type = A_FLOAT;
-  
-  x->event_mask = 1;
-  x->counter_f = 1;
-  x->counter_a = 0;
-  x->counter_b = 0;
-  x->delta_f = 0.0f;
-  x->delta_a = 0.0f;
-  x->delta_b = 0.0f;
-  x->interpol_time = 0.0f;
-  x->wn1 = 0.0f;
-  x->wn2 = 0.0f;
-  x->a0 = 0.0f;
-  x->a1 = 0.0f;
-  x->a2 = 0.0f;
-  x->b1 = 0.0f;
-  x->b2 = 0.0f;
-  x->sr = 3.14159265358979323846f / 44100.0f;
-  x->calc = sigfilter_snafu;
-  x->first_order = 0;
-  if((argc == 5)&&IS_A_FLOAT(argv,4)&&IS_A_FLOAT(argv,3)&&IS_A_FLOAT(argv,2)&&IS_A_FLOAT(argv,1)&&IS_A_SYMBOL(argv,0))
-  {
-    filt_typ = atom_getsymbolarg(0, argc, argv);
-    f = (float)atom_getfloatarg(1, argc, argv);
-    a = (float)atom_getfloatarg(2, argc, argv);
-    b = (float)atom_getfloatarg(3, argc, argv);
-    interpol = (float)atom_getfloatarg(4, argc, argv);
-  }
-  filt_name = (char *)filt_typ->s_name;
-  x->cur_f = f;
-  f *= x->sr;
-  if(f < 1.0e-20f)
-    x->cur_l = 1.0e20f;
-  else if(f > 1.57079632f)
-    x->cur_l = 0.0f;
-  else
-  {
-    si = sin(f);
-    co = cos(f);
-    x->cur_l = co/si;
-  }
-  if(a <= 0.0f)
-    a = 0.000001f;
-  if(b <= 0.0f)
-    b = 0.000001f;
-  x->cur_b = b;
-  
-  if(interpol <= 0.0f)
-    interpol = 0.0f;
-  x->interpol_time = interpol;
-  x->ticks_per_interpol_time = 0.001f * 44100.0f / 64.0f;
-  i = (int)((x->ticks_per_interpol_time)*(x->interpol_time)+0.49999f);
-  if(i <= 0)
-  {
-    x->ticks = 1;
-    x->rcp_ticks = 1.0f;
-  }
-  else
-  {
-    x->ticks = i;
-    x->rcp_ticks = 1.0f / (float)i;
-  }
-  
-  x->calc = sigfilter_snafu;
-  
-  x->cur_a = 1.0f/a; /*a was Q*/
-  x->inv = 1;
-  x->hp = 0;
-  
-  if(filt_name)
-  {
-    if(!strcmp(filt_name,"ap1"))
-    {
-      x->calc = sigfilter_ap1;
-      x->a1 = 1.0f;
-      x->first_order = 1;
-    }
-    else if(!strcmp(filt_name,"ap2"))
-    {
-      x->calc = sigfilter_ap2;
-      x->a2 = 1.0f;
-    }
-    else if(!strcmp(filt_name,"ap1c"))
-    {
-      x->calc = sigfilter_ap1;
-      x->a1 = 1.0f;
-      x->inv = 0;
-      x->cur_a = a; /*a was damping*/
-      x->first_order = 1;
-    }
-    else if(!strcmp(filt_name,"ap2c"))
-    {
-      x->calc = sigfilter_ap2;
-      x->a2 = 1.0f;
-      x->inv = 0;
-      x->cur_a = a; /*a was damping*/
-    }
-    else if(!strcmp(filt_name,"bpq2"))
-    {
-      x->calc = sigfilter_bp2;
-    }
-    else if(!strcmp(filt_name,"rbpq2"))
-    {
-      x->calc = sigfilter_rp2;
-    }
-    else if(!strcmp(filt_name,"bsq2"))
-    {
-      x->calc = sigfilter_bs2;
-    }
-    else if(!strcmp(filt_name,"bpw2"))
-    {
-      x->calc = sigfilter_bpw2;
-      x->inv = 0;
-      x->cur_a = a; /*a was bw*/
-    }
-    else if(!strcmp(filt_name,"rbpw2"))
-    {
-      x->calc = sigfilter_rpw2;
-      x->inv = 0;
-      x->cur_a = a; /*a was bw*/
-    }
-    else if(!strcmp(filt_name,"bsw2"))
-    {
-      x->calc = sigfilter_bsw2;
-      x->inv = 0;
-      x->cur_a = a; /*a was bw*/
-    }
-    else if(!strcmp(filt_name,"hp1"))
-    {
-      x->calc = sigfilter_hp1;
-      x->first_order = 1;
-    }
-    else if(!strcmp(filt_name,"hp2"))
-    {
-      x->calc = sigfilter_hp2;
-    }
-    else if(!strcmp(filt_name,"lp1"))
-    {
-      x->calc = sigfilter_lp1;
-      x->first_order = 1;
-    }
-    else if(!strcmp(filt_name,"lp2"))
-    {
-      x->calc = sigfilter_lp2;
-    }
-    else if(!strcmp(filt_name,"hp1c"))
-    {
-      x->calc = sigfilter_hp1;
-      x->cur_a = 1.0f / a;
-      x->first_order = 1;
-    }
-    else if(!strcmp(filt_name,"hp2c"))
-    {
-      x->calc = sigfilter_hp2;
-      x->inv = 0;
-      x->cur_a = a / b;
-      x->cur_b = 1.0f / b;
-      x->hp = 1;
-    }
-    else if(!strcmp(filt_name,"lp1c"))
-    {
-      x->calc = sigfilter_lp1;
-      x->inv = 0;
-      x->cur_a = a; /*a was damping*/
-      x->first_order = 1;
-    }
-    else if(!strcmp(filt_name,"lp2c"))
-    {
-      x->calc = sigfilter_lp2;
-      x->inv = 0;
-      x->cur_a = a; /*a was damping*/
-    }
-    else
-    {
-      post("filter~-Error: 1. initial-arguments: <sym> kind: \
-lp1, lp2, hp1, hp2, \
-lp1c, lp2c, hp1c, hp2c, \
-ap1, ap2, ap1c, ap2c, \
-bpq2, rbpq2, bsq2, \
-bpw2, rbpw2, bsw2!");
-    }
-    x->end_f = x->cur_f;
-    x->end_a = x->cur_a;
-    x->end_b = x->cur_b;
-  }
-  return (x);
-}
-
-void sigfilter_setup(void)
-{
-  sigfilter_class = class_new(gensym("filter~"), (t_newmethod)sigfilter_new,
-        0, sizeof(t_sigfilter), 0, A_GIMME, 0);
-  CLASS_MAINSIGNALIN(sigfilter_class, t_sigfilter, x_msi);
-  class_addmethod(sigfilter_class, (t_method)sigfilter_dsp, gensym("dsp"), 0);
-  class_addmethod(sigfilter_class, (t_method)sigfilter_ft1, gensym("ft1"), A_FLOAT, 0);
-  class_addmethod(sigfilter_class, (t_method)sigfilter_ft2, gensym("ft2"), A_FLOAT, 0);
-  class_addmethod(sigfilter_class, (t_method)sigfilter_ft3, gensym("ft3"), A_FLOAT, 0);
-  class_addmethod(sigfilter_class, (t_method)sigfilter_ft4, gensym("ft4"), A_FLOAT, 0);
-  class_addmethod(sigfilter_class, (t_method)sigfilter_print, gensym("print"), 0);
-  class_sethelpsymbol(sigfilter_class, gensym("iemhelp/help-filter~"));
-}
diff --git a/src/iemlib1/sighml_shelf.c b/src/iemlib1/sighml_shelf.c
deleted file mode 100644
index 0ce9b35..0000000
--- a/src/iemlib1/sighml_shelf.c
+++ /dev/null
@@ -1,557 +0,0 @@
-/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
-* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
-
-iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
-
-#ifdef _MSC_VER
-#pragma warning( disable : 4244 )
-#pragma warning( disable : 4305 )
-#endif
-
-
-#include "m_pd.h"
-#include "iemlib.h"
-#include <math.h>
-#include <stdio.h>
-#include <string.h>
-
-
-/* ---------- hml_shelf~ - high-middle-low-shelving filter ----------- */
-
-typedef struct sighml_shelf
-{
-  t_object  x_obj;
-  float     wn1;
-  float     wn2;
-  float     a0;
-  float     a1;
-  float     a2;
-  float     b1;
-  float     b2;
-  float     sr;
-  float     cur_lf;
-  float     cur_hf;
-  float     cur_lg;
-  float     cur_mg;
-  float     cur_hg;
-  float     delta_lf;
-  float     delta_hf;
-  float     delta_lg;
-  float     delta_mg;
-  float     delta_hg;
-  float     end_lf;
-  float     end_hf;
-  float     end_lg;
-  float     end_mg;
-  float     end_hg;
-  float     ticks_per_interpol_time;
-  float     rcp_ticks;
-  float     interpol_time;
-  int       ticks;
-  int       counter_lf;
-  int       counter_hf;
-  int       counter_lg;
-  int       counter_mg;
-  int       counter_hg;
-  int       event_mask;
-  void      *x_debug_outlet;
-  t_atom    x_at[5];
-  float     x_msi;
-} t_sighml_shelf;
-
-t_class *sighml_shelf_class;
-
-static void sighml_shelf_calc(t_sighml_shelf *x)
-{
-  float rf = x->cur_hf/x->cur_lf;
-  float mf = x->cur_hf*x->cur_lf;
-  float lg = x->cur_lg;
-  float rcplg = 1.0f/lg;
-  float mg = x->cur_mg;
-  float rcpmg = 1.0f/mg;
-  float hg = x->cur_hg;
-  float rcphg = 1.0f/hg;
-  float f = mf*x->sr;
-  float l = cos(f)/sin(f);
-  float k1 = rf*l;
-  float k2 = l/rf;
-  float k3 = l*l;
-  float k4 = k3*hg;
-  float k5 = k3*rcphg;
-  float k6 = rcplg + k5;
-  float k7 = rcpmg*k1 + k2*rcplg*rcphg*mg;
-  float k8 = lg + k4;
-  float k9 = mg*k1 + k2*lg*hg*rcpmg;
-  float k10 = 1.0f/(k6 + k7);
-  
-  x->b2 = k10*(k7 - k6);
-  x->b1 = k10*2.0f*(k5 - rcplg);
-  x->a2 = k10*(k8 - k9);
-  x->a1 = k10*2.0f*(lg - k4);
-  x->a0 = k10*(k8 + k9);
-}
-
-/*
-high- & low- shelving-filter:
-L....sqrt(lowlevel);
-rL...rsqrt(lowlevel);
-M....sqrt(mediumlevel);
-rM...rsqrt(mediumlevel);
-H....sqrt(highlevel);
-rH...rsqrt(highlevel);
-V....sqrt(highfrequency/lowfrequency);
-P....j*2*pi*f/(2*pi*V*lowfrequency);
-
-Y/X = [M/(1/M)] * [(L/M + PV)/(M/L + PV)] * [(1 + HP/(VM))/(1 + MP/(VH))];
-Y/X = (L + P*(M*V + L*H/(V*M)) + P*P*H) / (rL + P*(rM*V + rL*rH/(V*rM)) + P*P*rH);
-  
-hlshlv: lowlevel: ll; mediumlevel: lm; highlevel: hl; lowfrequency: fl; highfrequency: fh; samplerate: sr;
-    
-V = sqrt(fh/fl);
-f = fl*V;
-L = sqrt(ll);
-rL = 1.0/L;
-M = sqrt(lm);
-rM = 1.0/M;
-H = sqrt(lh);
-rH = 1.0/H;
-   
-l = cot(f*3.14159265358979323846/sr);
-k1 = V*l;
-k2 = l/V;
-l2 = l*l;
-l3 = l2*H;
-l4 = l2*rH;
-m1 = k2*L*H*rM;
-m2 = k2*rL*rH*M;
-n1 = rL + l4;
-n2 = rM*k1 + m2;
-p1 = L + l3;
-p2 = M*k1 + m1;
-a012 = 1.0/(n1 + n2);
-    
-b2 = a012*(n2 - n1);
-b1 = a012*2.0*(l4 - rL);
-a2 = a012*(p1 - p2);
-a1 = a012*2.0*(L - l3);
-a0 = a012*(p1 + p2);
-
-rf = sqrt(fh/fl);
-mf = fl*rf;
-L = sqrt(ll);
-rL = 1.0/L;
-M = sqrt(lm);
-rM = 1.0/M;
-H = sqrt(lh);
-rH = 1.0/H;
-                    
-l = cot(fm*3.14159265358979323846/sr);
-k1 = V*l;
-k2 = l/V;
-k3 = l*l;
-k4 = k3*H;
-k5 = k3*rH;
-k6 = rL + k5;
-k7 = rM*k1 + k2*rL*rH*M;
-k8 = L + k4;
-k9 = M*k1 + k2*L*H*rM;
-k10 = 1.0/(k6 + k7);
-                     
-b2 = k10*(k7 - k6);
-b1 = k10*2.0*(k5 - rL);
-a2 = k10*(k8 - k9);
-a1 = k10*2.0*(L - k4);
-a0 = k10*(k8 + k9);
-*/
-                        
-
-static void sighml_shelf_dsp_tick(t_sighml_shelf *x)
-{
-  if(x->event_mask)
-  {
-    float discriminant;
-    
-    if(x->counter_lg)
-    {
-      if(x->counter_lg <= 1)
-      {
-        x->cur_lg = x->end_lg;
-        x->counter_lg = 0;
-        x->event_mask &= 30;/*set event_mask_bit 0 = 0*/
-      }
-      else
-      {
-        x->counter_lg--;
-        x->cur_lg *= x->delta_lg;
-      }
-    }
-    if(x->counter_lf)
-    {
-      if(x->counter_lf <= 1)
-      {
-        x->cur_lf = x->end_lf;
-        x->counter_lf = 0;
-        x->event_mask &= 29;/*set event_mask_bit 1 = 0*/
-      }
-      else
-      {
-        x->counter_lf--;
-        x->cur_lf *= x->delta_lf;
-      }
-    }
-    if(x->counter_mg)
-    {
-      if(x->counter_mg <= 1)
-      {
-        x->cur_mg = x->end_mg;
-        x->counter_mg = 0;
-        x->event_mask &= 27;/*set event_mask_bit 2 = 0*/
-      }
-      else
-      {
-        x->counter_mg--;
-        x->cur_mg *= x->delta_mg;
-      }
-    }
-    if(x->counter_hf)
-    {
-      if(x->counter_hf <= 1)
-      {
-        x->cur_hf = x->end_hf;
-        x->counter_hf = 0;
-        x->event_mask &= 23;/*set event_mask_bit 3 = 0*/
-      }
-      else
-      {
-        x->counter_hf--;
-        x->cur_hf *= x->delta_hf;
-      }
-    }
-    if(x->counter_hg)
-    {
-      if(x->counter_hg <= 1)
-      {
-        x->cur_hg = x->end_hg;
-        x->counter_hg = 0;
-        x->event_mask &= 15;/*set event_mask_bit 4 = 0*/
-      }
-      else
-      {
-        x->counter_hg--;
-        x->cur_hg *= x->delta_hg;
-      }
-    }
-    sighml_shelf_calc(x);
-    
-    /* stability check */
-    
-    discriminant = x->b1 * x->b1 + 4.0f * x->b2;
-    if(x->b1 <= -1.9999996f)
-      x->b1 = -1.9999996f;
-    else if(x->b1 >= 1.9999996f)
-      x->b1 = 1.9999996f;
-    
-    if(x->b2 <= -0.9999998f)
-      x->b2 = -0.9999998f;
-    else if(x->b2 >= 0.9999998f)
-      x->b2 = 0.9999998f;
-    
-    if(discriminant >= 0.0f)
-    {
-      if(0.9999998f - x->b1 - x->b2 < 0.0f)
-        x->b2 = 0.9999998f - x->b1;
-      if(0.9999998f + x->b1 - x->b2 < 0.0f)
-        x->b2 = 0.9999998f + x->b1;
-    }
-  }
-}
-
-static t_int *sighml_shelf_perform(t_int *w)
-{
-  float *in = (float *)(w[1]);
-  float *out = (float *)(w[2]);
-  t_sighml_shelf *x = (t_sighml_shelf *)(w[3]);
-  int i, n = (t_int)(w[4]);
-  float wn0, wn1=x->wn1, wn2=x->wn2;
-  float a0=x->a0, a1=x->a1, a2=x->a2;
-  float b1=x->b1, b2=x->b2;
-  
-  sighml_shelf_dsp_tick(x);
-  for(i=0; i<n; i++)
-  {
-    wn0 = *in++ + b1*wn1 + b2*wn2;
-    *out++ = a0*wn0 + a1*wn1 + a2*wn2;
-    wn2 = wn1;
-    wn1 = wn0;
-  }
-  /* NAN protect */
-  if(IEM_DENORMAL(wn2))
-    wn2 = 0.0f;
-  if(IEM_DENORMAL(wn1))
-    wn1 = 0.0f;
-  
-  x->wn1 = wn1;
-  x->wn2 = wn2;
-  return(w+5);
-}
-
-/*   yn0 = *out;
-xn0 = *in;
-*************
-yn0 = a0*xn0 + a1*xn1 + a2*xn2 + b1*yn1 + b2*yn2;
-yn2 = yn1;
-yn1 = yn0;
-xn2 = xn1;
-xn1 = xn0;
-*************************
-y/x = (a0 + a1*z-1 + a2*z-2)/(1 - b1*z-1 - b2*z-2);
-*/
-
-static t_int *sighml_shelf_perf8(t_int *w)
-{
-  float *in = (float *)(w[1]);
-  float *out = (float *)(w[2]);
-  t_sighml_shelf *x = (t_sighml_shelf *)(w[3]);
-  int i, n = (t_int)(w[4]);
-  float wn[10];
-  float a0=x->a0, a1=x->a1, a2=x->a2;
-  float b1=x->b1, b2=x->b2;
-  
-  sighml_shelf_dsp_tick(x);
-  wn[0] = x->wn2;
-  wn[1] = x->wn1;
-  for(i=0; i<n; i+=8, in+=8, out+=8)
-  {
-    wn[2] = in[0] + b1*wn[1] + b2*wn[0];
-    out[0] = a0*wn[2] + a1*wn[1] + a2*wn[0];
-    wn[3] = in[1] + b1*wn[2] + b2*wn[1];
-    out[1] = a0*wn[3] + a1*wn[2] + a2*wn[1];
-    wn[4] = in[2] + b1*wn[3] + b2*wn[2];
-    out[2] = a0*wn[4] + a1*wn[3] + a2*wn[2];
-    wn[5] = in[3] + b1*wn[4] + b2*wn[3];
-    out[3] = a0*wn[5] + a1*wn[4] + a2*wn[3];
-    wn[6] = in[4] + b1*wn[5] + b2*wn[4];
-    out[4] = a0*wn[6] + a1*wn[5] + a2*wn[4];
-    wn[7] = in[5] + b1*wn[6] + b2*wn[5];
-    out[5] = a0*wn[7] + a1*wn[6] + a2*wn[5];
-    wn[8] = in[6] + b1*wn[7] + b2*wn[6];
-    out[6] = a0*wn[8] + a1*wn[7] + a2*wn[6];
-    wn[9] = in[7] + b1*wn[8] + b2*wn[7];
-    out[7] = a0*wn[9] + a1*wn[8] + a2*wn[7];
-    wn[0] = wn[8];
-    wn[1] = wn[9];
-  }
-  /* NAN protect */
-  if(IEM_DENORMAL(wn[0]))
-    wn[0] = 0.0f;
-  if(IEM_DENORMAL(wn[1]))
-    wn[1] = 0.0f;
-  
-  x->wn1 = wn[1];
-  x->wn2 = wn[0];
-  return(w+5);
-}
-
-static void sighml_shelf_ft6(t_sighml_shelf *x, t_floatarg t)
-{
-  int i = (int)((x->ticks_per_interpol_time)*t);
-  
-  x->interpol_time = t;
-  if(i <= 0)
-    i = 1;
-  x->ticks = i;
-  x->rcp_ticks = 1.0f / (float)i;
-}
-
-static void sighml_shelf_ft5(t_sighml_shelf *x, t_floatarg hl)
-{
-  float hg = exp(0.057564627325 * hl);
-  
-  if(hg != x->cur_hg)
-  {
-    x->end_hg = hg;
-    x->counter_hg = x->ticks;
-    x->delta_hg = exp(log(hg/x->cur_hg)*x->rcp_ticks);
-    x->event_mask |= 16;/*set event_mask_bit 4 = 1*/
-  }
-}
-
-static void sighml_shelf_ft4(t_sighml_shelf *x, t_floatarg hf)
-{
-  float sqhf;
-  
-  if(hf <= 0.0f)
-    hf = 0.000001f;
-  sqhf = sqrt(hf);
-  if(sqhf != x->cur_hf)
-  {
-    x->end_hf = sqhf;
-    x->counter_hf = x->ticks;
-    x->delta_hf = exp(log(sqhf/x->cur_hf)*x->rcp_ticks);
-    x->event_mask |= 8;/*set event_mask_bit 3 = 1*/
-  }
-}
-
-static void sighml_shelf_ft3(t_sighml_shelf *x, t_floatarg ml)
-{
-  float mg = exp(0.057564627325 * ml);
-  
-  if(mg != x->cur_mg)
-  {
-    x->end_mg = mg;
-    x->counter_mg = x->ticks;
-    x->delta_mg = exp(log(mg/x->cur_mg)*x->rcp_ticks);
-    x->event_mask |= 4;/*set event_mask_bit 2 = 1*/
-  }
-}
-
-static void sighml_shelf_ft2(t_sighml_shelf *x, t_floatarg lf)
-{
-  float sqlf;
-  
-  if(lf <= 0.0f)
-    lf = 0.000001f;
-  sqlf = sqrt(lf);
-  if(sqlf != x->cur_lf)
-  {
-    x->end_lf = sqlf;
-    x->counter_lf = x->ticks;
-    x->delta_lf = exp(log(sqlf/x->cur_lf)*x->rcp_ticks);
-    x->event_mask |= 2;/*set event_mask_bit 1 = 1*/
-  }
-}
-
-static void sighml_shelf_ft1(t_sighml_shelf *x, t_floatarg ll)
-{
-  float lg = exp(0.057564627325 * ll);
-  
-  if(lg != x->cur_lg)
-  {
-    x->end_lg = lg;
-    x->counter_lg = x->ticks;
-    x->delta_lg = exp(log(lg/x->cur_lg)*x->rcp_ticks);
-    x->event_mask |= 1;/*set event_mask_bit 0 = 1*/
-  }
-}
-
-static void sighml_shelf_print(t_sighml_shelf *x)
-{
-  //  post("fb1 = %g, fb2 = %g, ff1 = %g, ff2 = %g, ff3 = %g", x->b1, x->b2, x->a0, x->a1, x->a2);
-  x->x_at[0].a_w.w_float = x->b1;
-  x->x_at[1].a_w.w_float = x->b2;
-  x->x_at[2].a_w.w_float = x->a0;
-  x->x_at[3].a_w.w_float = x->a1;
-  x->x_at[4].a_w.w_float = x->a2;
-  outlet_list(x->x_debug_outlet, &s_list, 5, x->x_at);
-}
-
-static void sighml_shelf_dsp(t_sighml_shelf *x, t_signal **sp)
-{
-  int i, n=(int)sp[0]->s_n;
-  
-  x->sr = 3.14159265358979323846f / (float)(sp[0]->s_sr);
-  x->ticks_per_interpol_time = 0.001f * (float)(sp[0]->s_sr) / (float)n;
-  i = (int)((x->ticks_per_interpol_time)*(x->interpol_time));
-  if(i <= 0)
-    i = 1;
-  x->ticks = i;
-  x->rcp_ticks = 1.0f / (float)i;
-  if(n&7)
-    dsp_add(sighml_shelf_perform, 4, sp[0]->s_vec, sp[1]->s_vec, x, n);
-  else
-    dsp_add(sighml_shelf_perf8, 4, sp[0]->s_vec, sp[1]->s_vec, x, n);
-}
-
-static void *sighml_shelf_new(t_symbol *s, int argc, t_atom *argv)
-{
-  t_sighml_shelf *x = (t_sighml_shelf *)pd_new(sighml_shelf_class);
-  int i;
-  float lf=200.0f, hf=2000.0f, ll=0.0f, ml=0.0f, hl=0.0f, interpol=0.0f;
-  
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft2"));
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft3"));
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft4"));
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft5"));
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft6"));
-  outlet_new(&x->x_obj, &s_signal);
-  x->x_debug_outlet = outlet_new(&x->x_obj, &s_list);
-  x->x_msi = 0;
-  
-  x->x_at[0].a_type = A_FLOAT;
-  x->x_at[1].a_type = A_FLOAT;
-  x->x_at[2].a_type = A_FLOAT;
-  x->x_at[3].a_type = A_FLOAT;
-  x->x_at[4].a_type = A_FLOAT;
-  
-  x->event_mask = 2;
-  x->counter_lg = 0;
-  x->counter_lf = 1;
-  x->counter_mg = 0;
-  x->counter_hf = 0;
-  x->counter_hg = 0;
-  x->delta_lg = 0.0f;
-  x->delta_lf = 0.0f;
-  x->delta_mg = 0.0f;
-  x->delta_hf = 0.0f;
-  x->delta_hg = 0.0f;
-  x->interpol_time = 0.0f;
-  x->wn1 = 0.0f;
-  x->wn2 = 0.0f;
-  x->a0 = 0.0f;
-  x->a1 = 0.0f;
-  x->a2 = 0.0f;
-  x->b1 = 0.0f;
-  x->b2 = 0.0f;
-  x->sr = 3.14159265358979323846f / 44100.0f;
-  if((argc == 6)&&IS_A_FLOAT(argv,5)&&IS_A_FLOAT(argv,4)&&IS_A_FLOAT(argv,3)
-    &&IS_A_FLOAT(argv,2)&&IS_A_FLOAT(argv,1)&&IS_A_FLOAT(argv,0))
-  {
-    ll = (float)atom_getfloatarg(0, argc, argv);
-    lf = (float)atom_getfloatarg(1, argc, argv);
-    ml = (float)atom_getfloatarg(2, argc, argv);
-    hf = (float)atom_getfloatarg(3, argc, argv);
-    hl = (float)atom_getfloatarg(4, argc, argv);
-    interpol = (float)atom_getfloatarg(5, argc, argv);
-  }
-  x->cur_lg = exp(0.057564627325 * ll);
-  x->cur_mg = exp(0.057564627325 * ml);
-  x->cur_hg = exp(0.057564627325 * hl);
-  if(lf <= 0.0f)
-    lf = 0.000001f;
-  if(hf <= 0.0f)
-    hf = 0.000001f;
-  x->cur_lf = sqrt(lf);
-  x->cur_hf = sqrt(hf);
-  if(interpol < 0.0f)
-    interpol = 0.0f;
-  x->interpol_time = interpol;
-  x->ticks_per_interpol_time = 0.5f;
-  i = (int)((x->ticks_per_interpol_time)*(x->interpol_time));
-  if(i <= 0)
-    i = 1;
-  x->ticks = i;
-  x->rcp_ticks = 1.0f / (float)i;
-  x->end_lf = x->cur_lf;
-  x->end_hf = x->cur_hf;
-  x->end_lg = x->cur_lg;
-  x->end_mg = x->cur_mg;
-  x->end_hg = x->cur_hg;
-  return(x);
-}
-
-void sighml_shelf_setup(void)
-{
-  sighml_shelf_class = class_new(gensym("hml_shelf~"), (t_newmethod)sighml_shelf_new,
-    0, sizeof(t_sighml_shelf), 0, A_GIMME, 0);
-  CLASS_MAINSIGNALIN(sighml_shelf_class, t_sighml_shelf, x_msi);
-  class_addmethod(sighml_shelf_class, (t_method)sighml_shelf_dsp, gensym("dsp"), 0);
-  class_addmethod(sighml_shelf_class, (t_method)sighml_shelf_ft1, gensym("ft1"), A_FLOAT, 0);
-  class_addmethod(sighml_shelf_class, (t_method)sighml_shelf_ft2, gensym("ft2"), A_FLOAT, 0);
-  class_addmethod(sighml_shelf_class, (t_method)sighml_shelf_ft3, gensym("ft3"), A_FLOAT, 0);
-  class_addmethod(sighml_shelf_class, (t_method)sighml_shelf_ft4, gensym("ft4"), A_FLOAT, 0);
-  class_addmethod(sighml_shelf_class, (t_method)sighml_shelf_ft5, gensym("ft5"), A_FLOAT, 0);
-  class_addmethod(sighml_shelf_class, (t_method)sighml_shelf_ft6, gensym("ft6"), A_FLOAT, 0);
-  class_addmethod(sighml_shelf_class, (t_method)sighml_shelf_print, gensym("print"), 0);
-  class_sethelpsymbol(sighml_shelf_class, gensym("iemhelp/help-hml_shelf~"));
-}
diff --git a/src/iemlib1/sigiem_cot4.c b/src/iemlib1/sigiem_cot4.c
deleted file mode 100644
index 85bc19a..0000000
--- a/src/iemlib1/sigiem_cot4.c
+++ /dev/null
@@ -1,175 +0,0 @@
-/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
-* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
-
-iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
-
-#ifdef _MSC_VER
-#pragma warning( disable : 4244 )
-#pragma warning( disable : 4305 )
-#endif
-
-
-#include "m_pd.h"
-#include "iemlib.h"
-#include <math.h>
-#include <stdio.h>
-#include <string.h>
-
-/* ------------------------ iem_cot4~ ----------------------------- */
-
-float *iem_cot4_table_cos=(float *)0L;
-float *iem_cot4_table_sin=(float *)0L;
-
-static t_class *sigiem_cot4_class;
-
-typedef struct _sigiem_cot4
-{
-  t_object  x_obj;
-  float     x_sr;
-  float     x_msi;
-} t_sigiem_cot4;
-
-static t_int *sigiem_cot4_perform(t_int *w)
-{
-  t_float *in = (t_float *)(w[1]);
-  t_float *out = (t_float *)(w[2]);
-  t_float norm_freq;
-  t_float hout;
-  t_sigiem_cot4 *x = (t_sigiem_cot4 *)(w[3]);
-  t_float sr=x->x_sr;
-  int n = (int)(w[4]);
-  float *ctab = iem_cot4_table_cos, *stab = iem_cot4_table_sin;
-  float *caddr, *saddr, cf1, cf2, sf1, sf2, frac;
-  double dphase;
-  int normhipart;
-  int32 mytfi;
-  union tabfudge tf;
-  
-  tf.tf_d = UNITBIT32;
-  normhipart = tf.tf_i[HIOFFSET];
-  
-#if 0     /* this is the readable version of the code. */
-  while (n--)
-  {
-    norm_freq = *in * sr;
-    if(norm_freq < 0.0001f)
-      norm_freq = 0.0001f;
-    else if(norm_freq > 0.9f)
-      norm_freq = 0.9f;
-    dphase = (double)(norm_freq * (float)(COSTABSIZE)) + UNITBIT32;
-    tf.tf_d = dphase;
-    mytfi = tf.tf_i[HIOFFSET] & (COSTABSIZE-1);
-    saddr = stab + (mytfi);
-    caddr = ctab + (mytfi);
-    tf.tf_i[HIOFFSET] = normhipart;
-    frac = tf.tf_d - UNITBIT32;
-    sf1 = saddr[0];
-    sf2 = saddr[1];
-    cf1 = caddr[0];
-    cf2 = caddr[1];
-    in++;
-    *out++ = (cf1 + frac * (cf2 - cf1))/(sf1 + frac * (sf2 - sf1));
-  }
-#endif
-#if 1     /* this is the same, unwrapped by hand. prolog beg*/
-  n /= 4;
-  norm_freq = *in * sr;
-  if(norm_freq < 0.0001f)
-    norm_freq = 0.0001f;
-  else if(norm_freq > 0.9f)
-    norm_freq = 0.9f;
-  dphase = (double)(norm_freq * (float)(COSTABSIZE)) + UNITBIT32;
-  tf.tf_d = dphase;
-  mytfi = tf.tf_i[HIOFFSET] & (COSTABSIZE-1);
-  saddr = stab + (mytfi);
-  caddr = ctab + (mytfi);
-  tf.tf_i[HIOFFSET] = normhipart;   
-  in += 4;                 /*prolog end*/
-  while (--n)
-  {
-    norm_freq = *in * sr;
-    if(norm_freq < 0.0001f)
-      norm_freq = 0.0001f;
-    else if(norm_freq > 0.9f)
-      norm_freq = 0.9f;
-    dphase = (double)(norm_freq * (float)(COSTABSIZE)) + UNITBIT32;
-    frac = tf.tf_d - UNITBIT32;
-    tf.tf_d = dphase;
-    sf1 = saddr[0];
-    sf2 = saddr[1];
-    cf1 = caddr[0];
-    cf2 = caddr[1];
-    mytfi = tf.tf_i[HIOFFSET] & (COSTABSIZE-1);
-    saddr = stab + (mytfi);
-    caddr = ctab + (mytfi);
-    hout = (cf1 + frac * (cf2 - cf1))/(sf1 + frac * (sf2 - sf1));
-    *out++ = hout;
-    *out++ = hout;
-    *out++ = hout;
-    *out++ = hout;
-    in += 4;
-    tf.tf_i[HIOFFSET] = normhipart;
-  }/*epilog beg*/
-  frac = tf.tf_d - UNITBIT32;
-  sf1 = saddr[0];
-  sf2 = saddr[1];
-  cf1 = caddr[0];
-  cf2 = caddr[1];
-  hout = (cf1 + frac * (cf2 - cf1))/(sf1 + frac * (sf2 - sf1));
-  *out++ = hout;
-  *out++ = hout;
-  *out++ = hout;
-  *out++ = hout;
-  /*epilog end*/
-#endif
-  return (w+5);
-}
-
-static void sigiem_cot4_dsp(t_sigiem_cot4 *x, t_signal **sp)
-{
-  x->x_sr = 2.0f / (float)sp[0]->s_sr;
-  dsp_add(sigiem_cot4_perform, 4, sp[0]->s_vec, sp[1]->s_vec, x, sp[0]->s_n);
-}
-
-static void sigiem_cot4_maketable(void)
-{
-  int i;
-  float *fp, phase, fff, phsinc = 0.5*3.141592653 / ((float)COSTABSIZE);
-  union tabfudge tf;
-  
-  if(!iem_cot4_table_sin)
-  {
-    iem_cot4_table_sin = (float *)getbytes(sizeof(float) * (COSTABSIZE+1));
-    for(i=COSTABSIZE+1, fp=iem_cot4_table_sin, phase=0; i--; fp++, phase+=phsinc)
-      *fp = sin(phase);
-  }
-  if(!iem_cot4_table_cos)
-  {
-    iem_cot4_table_cos = (float *)getbytes(sizeof(float) * (COSTABSIZE+1));
-    for(i=COSTABSIZE+1, fp=iem_cot4_table_cos, phase=0; i--; fp++, phase+=phsinc)
-      *fp = cos(phase);
-  }
-  tf.tf_d = UNITBIT32 + 0.5;
-  if((unsigned)tf.tf_i[LOWOFFSET] != 0x80000000)
-    bug("iem_cot4~: unexpected machine alignment");
-}
-
-static void *sigiem_cot4_new(void)
-{
-  t_sigiem_cot4 *x = (t_sigiem_cot4 *)pd_new(sigiem_cot4_class);
-  
-  outlet_new(&x->x_obj, gensym("signal"));
-  x->x_msi = 0;
-  return (x);
-}
-
-void sigiem_cot4_setup(void)
-{
-  sigiem_cot4_class = class_new(gensym("iem_cot4~"), (t_newmethod)sigiem_cot4_new, 0,
-    sizeof(t_sigiem_cot4), 0, 0);
-  class_addcreator((t_newmethod)sigiem_cot4_new, gensym("iem_cot~"), 0);
-  CLASS_MAINSIGNALIN(sigiem_cot4_class, t_sigiem_cot4, x_msi);
-  class_addmethod(sigiem_cot4_class, (t_method)sigiem_cot4_dsp, gensym("dsp"), 0);
-  sigiem_cot4_maketable();
-  class_sethelpsymbol(sigiem_cot4_class, gensym("iemhelp/help-iem_cot4~"));
-}
diff --git a/src/iemlib1/sigiem_delay.c b/src/iemlib1/sigiem_delay.c
deleted file mode 100644
index 9812a11..0000000
--- a/src/iemlib1/sigiem_delay.c
+++ /dev/null
@@ -1,209 +0,0 @@
-/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
-* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
-
-iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
-
-#ifdef _MSC_VER
-#pragma warning( disable : 4244 )
-#pragma warning( disable : 4305 )
-#endif
-
-
-#include "m_pd.h"
-#include "iemlib.h"
-#include <math.h>
-#include <stdio.h>
-#include <string.h>
-
-/* -------------------------- sigiem_delay~ ------------------------------ */
-
-static t_class *sigiem_delay_class;
-
-#define IEMDELAY_DEF_VEC_SIZE 64
-
-typedef struct _sigiem_delay
-{
-  t_object  x_obj;
-  int       x_mallocsize;
-  t_float   x_max_delay_ms;
-  t_float   x_current_delay_ms;
-  t_float   *x_begmem1;
-  t_float   *x_begmem2;
-  int       x_writeindex;
-  int       x_blocksize;
-  int       x_delay_samples;
-  t_float   x_sr;
-  t_float   x_msi;
-} t_sigiem_delay;
-
-static void sigiem_delay_cur_del(t_sigiem_delay *x, t_floatarg f)
-{
-  if(f < 0.0f)
-    f = 0.0f;
-  else if(f > x->x_max_delay_ms)
-    f = x->x_max_delay_ms;
-  x->x_current_delay_ms = f;
-  x->x_delay_samples = (int)(0.001f*x->x_sr * f + 0.5f);
-}
-
-static t_int *sigiem_delay_perform(t_int *w)
-{
-  t_float *in = (t_float *)(w[1]);
-  t_float *out = (t_float *)(w[2]);
-  t_sigiem_delay *x = (t_sigiem_delay *)(w[3]);
-  int n=(int)(w[4]);
-  int writeindex = x->x_writeindex;
-  t_float *vec1, *vec2, *vec3;
-  
-  vec1 = x->x_begmem1 + writeindex;
-  vec2 = x->x_begmem2 + writeindex;
-  vec3 = x->x_begmem2 + writeindex - x->x_delay_samples;
-  writeindex += n;
-  while(n--)
-  {
-    *vec1++ = *vec2++ = *in++;
-    *out++ = *vec3++;
-  }
-  if(writeindex >= x->x_mallocsize)
-  {
-    writeindex -= x->x_mallocsize;
-  }
-  x->x_writeindex = writeindex;
-  return(w+5);
-}
-
-static t_int *sigiem_delay_perf8(t_int *w)
-{
-  t_float *in = (t_float *)(w[1]);
-  t_float *out = (t_float *)(w[2]);
-  t_sigiem_delay *x = (t_sigiem_delay *)(w[3]);
-  int i, n=(int)(w[4]);
-  int writeindex = x->x_writeindex;
-  t_float *vec1, *vec2;
-  
-  vec1 = x->x_begmem1 + writeindex;
-  vec2 = x->x_begmem2 + writeindex;
-  for(i=0; i<n; i+=8)
-  {
-    *vec1++ = *vec2++ = *in++;
-    *vec1++ = *vec2++ = *in++;
-    *vec1++ = *vec2++ = *in++;
-    *vec1++ = *vec2++ = *in++;
-    *vec1++ = *vec2++ = *in++;
-    *vec1++ = *vec2++ = *in++;
-    *vec1++ = *vec2++ = *in++;
-    *vec1++ = *vec2++ = *in++;
-  }
-  
-  vec2 = x->x_begmem2 + writeindex - x->x_delay_samples;
-  for(i=0; i<n; i+=8)
-  {
-    *out++ = *vec2++;
-    *out++ = *vec2++;
-    *out++ = *vec2++;
-    *out++ = *vec2++;
-    *out++ = *vec2++;
-    *out++ = *vec2++;
-    *out++ = *vec2++;
-    *out++ = *vec2++;
-  }
-  
-  writeindex += n;
-  if(writeindex >= x->x_mallocsize)
-  {
-    writeindex -= x->x_mallocsize;
-  }
-  x->x_writeindex = writeindex;
-  return(w+5);
-}
-
-static void sigiem_delay_dsp(t_sigiem_delay *x, t_signal **sp)
-{
-  int blocksize = sp[0]->s_n, i;
-  
-  if(!x->x_blocksize)/*first time*/
-  {
-    int nsamps = x->x_max_delay_ms * (t_float)sp[0]->s_sr * 0.001f;
-    
-    if(nsamps < 1)
-      nsamps = 1;
-    nsamps += ((- nsamps) & (blocksize - 1));
-    nsamps += blocksize;
-    x->x_mallocsize = nsamps;
-    x->x_begmem1 = (t_float *)getbytes(2 * x->x_mallocsize * sizeof(t_float));
-    x->x_begmem2 = x->x_begmem1 + x->x_mallocsize;
-    post("beginn = %x", (unsigned long)x->x_begmem1);
-    x->x_writeindex = blocksize;
-    x->x_sr = (t_float)sp[0]->s_sr;
-    x->x_blocksize = blocksize;
-    x->x_delay_samples = (int)(0.001f*x->x_sr * x->x_current_delay_ms + 0.5f);
-  }
-  else if((x->x_blocksize != blocksize) || ((t_float)sp[0]->s_sr != x->x_sr))
-  {
-    int nsamps = x->x_max_delay_ms * (t_float)sp[0]->s_sr * 0.001f;
-    
-    if(nsamps < 1)
-      nsamps = 1;
-    nsamps += ((- nsamps) & (blocksize - 1));
-    nsamps += blocksize;
-    
-    x->x_begmem1 = (t_float *)resizebytes(x->x_begmem1, 2*x->x_mallocsize*sizeof(t_float), 2*nsamps*sizeof(t_float));
-    x->x_mallocsize = nsamps;
-    x->x_begmem2 = x->x_begmem1 + x->x_mallocsize;
-    post("beginn = %x", (unsigned long)x->x_begmem1);
-    if(x->x_writeindex >= nsamps)
-      x->x_writeindex -= nsamps;
-    x->x_sr = (t_float)sp[0]->s_sr;
-    x->x_blocksize = blocksize;
-    x->x_delay_samples = (int)(0.001f*x->x_sr * x->x_current_delay_ms + 0.5f);
-  }
-  
-  if(blocksize&7)
-    dsp_add(sigiem_delay_perform, 4, sp[0]->s_vec, sp[1]->s_vec, x, blocksize);
-  else
-    dsp_add(sigiem_delay_perf8, 4, sp[0]->s_vec, sp[1]->s_vec, x, blocksize);
-}
-
-static void *sigiem_delay_new(t_floatarg max_delay_ms, t_floatarg current_delay_ms)
-{
-  t_sigiem_delay *x = (t_sigiem_delay *)pd_new(sigiem_delay_class);
-  int nsamps;
-  
-  if(max_delay_ms < 2.0f)
-    max_delay_ms = 2.0f;
-  x->x_max_delay_ms = max_delay_ms;
-  if(current_delay_ms < 0.0f)
-    current_delay_ms = 0.0f;
-  else if(current_delay_ms > max_delay_ms)
-    current_delay_ms = max_delay_ms;
-  x->x_current_delay_ms = current_delay_ms;
-  nsamps = max_delay_ms * sys_getsr() * 0.001f;
-  if(nsamps < 1)
-    nsamps = 1;
-  nsamps += ((- nsamps) & (IEMDELAY_DEF_VEC_SIZE - 1));
-  nsamps += IEMDELAY_DEF_VEC_SIZE;
-  x->x_mallocsize = nsamps;
-  x->x_begmem1 = (t_float *)getbytes(2 * x->x_mallocsize * sizeof(t_float));
-  x->x_begmem2 = x->x_begmem1 + x->x_mallocsize;
-  x->x_writeindex = IEMDELAY_DEF_VEC_SIZE;
-  x->x_blocksize = 0;
-  x->x_sr = 0.0f;
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
-  outlet_new(&x->x_obj, &s_signal);
-  x->x_msi = 0.0f;
-  return (x);
-}
-
-static void sigiem_delay_free(t_sigiem_delay *x)
-{
-  freebytes(x->x_begmem1, 2 * x->x_mallocsize * sizeof(t_float));
-}
-
-void sigiem_delay_setup(void)
-{
-  sigiem_delay_class = class_new(gensym("iem_delay~"), (t_newmethod)sigiem_delay_new, (t_method)sigiem_delay_free,
-    sizeof(t_sigiem_delay), 0, A_DEFFLOAT, A_DEFFLOAT, 0);
-  CLASS_MAINSIGNALIN(sigiem_delay_class, t_sigiem_delay, x_msi);
-  class_addmethod(sigiem_delay_class, (t_method)sigiem_delay_dsp, gensym("dsp"), 0);
-  class_addmethod(sigiem_delay_class, (t_method)sigiem_delay_cur_del, gensym("ft1"), A_FLOAT, 0);
-}
diff --git a/src/iemlib1/sigiem_pow4.c b/src/iemlib1/sigiem_pow4.c
deleted file mode 100644
index 130e7e3..0000000
--- a/src/iemlib1/sigiem_pow4.c
+++ /dev/null
@@ -1,86 +0,0 @@
-/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
-* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
-
-iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
-
-#ifdef _MSC_VER
-#pragma warning( disable : 4244 )
-#pragma warning( disable : 4305 )
-#endif
-
-
-#include "m_pd.h"
-#include "iemlib.h"
-#include <math.h>
-#include <stdio.h>
-#include <string.h>
-
-/* ------------------------ iem_pow4~ ----------------------------- */
-
-static t_class *sigiem_pow4_class;
-
-typedef struct _sigiem_pow4
-{
-  t_object  x_obj;
-  float     x_exp;
-  float     x_msi;
-} t_sigiem_pow4;
-
-static void sigiem_pow4_ft1(t_sigiem_pow4 *x, t_floatarg f)
-{
-  x->x_exp = f;
-}
-
-static t_int *sigiem_pow4_perform(t_int *w)
-{
-  t_float *in = (t_float *)(w[1]);
-  t_float *out = (t_float *)(w[2]);
-  t_sigiem_pow4 *x = (t_sigiem_pow4 *)(w[3]);
-  t_float y=x->x_exp;
-  t_float f, g;
-  int n = (int)(w[4])/4;
-  
-  while (n--)
-  {
-    f = *in;
-    if(f < 0.01f)
-      f = 0.01f;
-    else if(f > 1000.0f)
-      f = 1000.0f;
-    g = log(f);
-    f = exp(g*y);
-    *out++ = f;
-    *out++ = f;
-    *out++ = f;
-    *out++ = f;
-    in += 4;
-  }
-  return (w+5);
-}
-
-static void sigiem_pow4_dsp(t_sigiem_pow4 *x, t_signal **sp)
-{
-  dsp_add(sigiem_pow4_perform, 4, sp[0]->s_vec, sp[1]->s_vec, x, sp[0]->s_n);
-}
-
-static void *sigiem_pow4_new(t_floatarg f)
-{
-  t_sigiem_pow4 *x = (t_sigiem_pow4 *)pd_new(sigiem_pow4_class);
-  
-  x->x_exp = f;
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
-  outlet_new(&x->x_obj, gensym("signal"));
-  x->x_msi = 0;
-  return (x);
-}
-
-void sigiem_pow4_setup(void)
-{
-  sigiem_pow4_class = class_new(gensym("iem_pow4~"), (t_newmethod)sigiem_pow4_new, 0,
-    sizeof(t_sigiem_pow4), 0, A_DEFFLOAT, 0);
-  class_addcreator((t_newmethod)sigiem_pow4_new, gensym("icot~"), 0);
-  CLASS_MAINSIGNALIN(sigiem_pow4_class, t_sigiem_pow4, x_msi);
-  class_addmethod(sigiem_pow4_class, (t_method)sigiem_pow4_dsp, gensym("dsp"), 0);
-  class_addmethod(sigiem_pow4_class, (t_method)sigiem_pow4_ft1, gensym("ft1"), A_FLOAT, 0);
-  class_sethelpsymbol(sigiem_pow4_class, gensym("iemhelp/help-iem_pow4~"));
-}
diff --git a/src/iemlib1/sigiem_sqrt4.c b/src/iemlib1/sigiem_sqrt4.c
deleted file mode 100644
index f7d0191..0000000
--- a/src/iemlib1/sigiem_sqrt4.c
+++ /dev/null
@@ -1,116 +0,0 @@
-/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
-* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
-
-iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
-
-#ifdef _MSC_VER
-#pragma warning( disable : 4244 )
-#pragma warning( disable : 4305 )
-#endif
-
-
-#include "m_pd.h"
-#include "iemlib.h"
-#include <math.h>
-#include <stdio.h>
-#include <string.h>
-
-#define IEMSQRT4TAB1SIZE 256
-#define IEMSQRT4TAB2SIZE 1024
-
-/* ------------------------ iem_sqrt4~ ----------------------------- */
-
-float *iem_sqrt4_exptab=(float *)0L;
-float *iem_sqrt4_mantissatab=(float *)0L;
-
-static t_class *sigiem_sqrt4_class;
-
-typedef struct _sigiem_sqrt4
-{
-  t_object  x_obj;
-  float     x_msi;
-} t_sigiem_sqrt4;
-
-static t_int *sigiem_sqrt4_perform(t_int *w)
-{
-  t_float *in = (t_float *)(w[1]);
-  t_float *out = (t_float *)(w[2]);
-  t_int n = (t_int)(w[3])/4;
-  
-  while(n--)
-  { 
-    float f = *in;
-    float g, h;
-    long l = *(long *)(in);
-    
-    if(f < 0.0f)
-    {
-      *out++ = 0.0f;
-      *out++ = 0.0f;
-      *out++ = 0.0f;
-      *out++ = 0.0f;
-    }
-    else
-    {
-      g = iem_sqrt4_exptab[(l >> 23) & 0xff] * iem_sqrt4_mantissatab[(l >> 13) & 0x3ff];
-      h = f * (1.5f * g - 0.5f * g * g * g * f);
-      *out++ = h;
-      *out++ = h;
-      *out++ = h;
-      *out++ = h;
-    }
-    in += 4;
-  }
-  return(w+4);
-}
-
-static void sigiem_sqrt4_dsp(t_sigiem_sqrt4 *x, t_signal **sp)
-{
-  dsp_add(sigiem_sqrt4_perform, 3, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
-}
-
-static void sigiem_sqrt4_maketable(void)
-{
-  int i;
-  float f;
-  long l;
-  
-  if(!iem_sqrt4_exptab)
-  {
-    iem_sqrt4_exptab = (float *)getbytes(sizeof(float) * IEMSQRT4TAB1SIZE);
-    for(i=0; i<IEMSQRT4TAB1SIZE; i++)
-    {
-      l = (i ? (i == IEMSQRT4TAB1SIZE-1 ? IEMSQRT4TAB1SIZE-2 : i) : 1)<< 23;
-      *(long *)(&f) = l;
-      iem_sqrt4_exptab[i] = 1.0f/sqrt(f); 
-    }
-  }
-  if(!iem_sqrt4_mantissatab)
-  {
-    iem_sqrt4_mantissatab = (float *)getbytes(sizeof(float) * IEMSQRT4TAB2SIZE);
-    for(i=0; i<IEMSQRT4TAB2SIZE; i++)
-    {
-      f = 1.0f + (1.0f/(float)IEMSQRT4TAB2SIZE) * (float)i;
-      iem_sqrt4_mantissatab[i] = 1.0f/sqrt(f);  
-    }
-  }
-}
-
-static void *sigiem_sqrt4_new(void)
-{
-  t_sigiem_sqrt4 *x = (t_sigiem_sqrt4 *)pd_new(sigiem_sqrt4_class);
-  
-  outlet_new(&x->x_obj, gensym("signal"));
-  x->x_msi = 0;
-  return (x);
-}
-
-void sigiem_sqrt4_setup(void)
-{
-  sigiem_sqrt4_class = class_new(gensym("iem_sqrt4~"), (t_newmethod)sigiem_sqrt4_new, 0,
-    sizeof(t_sigiem_sqrt4), 0, 0);
-  CLASS_MAINSIGNALIN(sigiem_sqrt4_class, t_sigiem_sqrt4, x_msi);
-  class_addmethod(sigiem_sqrt4_class, (t_method)sigiem_sqrt4_dsp, gensym("dsp"), 0);
-  sigiem_sqrt4_maketable();
-  class_sethelpsymbol(sigiem_sqrt4_class, gensym("iemhelp/help-iem_sqrt4~"));
-}
diff --git a/src/iemlib1/siglp1_t.c b/src/iemlib1/siglp1_t.c
deleted file mode 100644
index c360b15..0000000
--- a/src/iemlib1/siglp1_t.c
+++ /dev/null
@@ -1,219 +0,0 @@
-/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
-* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
-
-iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
-
-#ifdef _MSC_VER
-#pragma warning( disable : 4244 )
-#pragma warning( disable : 4305 )
-#endif
-
-
-#include "m_pd.h"
-#include "iemlib.h"
-#include <math.h>
-#include <stdio.h>
-#include <string.h>
-
-
-/* -- lp1_t~ - slow dynamic lowpass-filter 1. order with tau input --- */
-
-typedef struct siglp1_t
-{
-  t_object  x_obj;
-  float     yn1;
-  float     c0;
-  float     c1;
-  float     sr;
-  float     cur_t;
-  float     delta_t;
-  float     end_t;
-  float     ticks_per_interpol_time;
-  float     rcp_ticks;
-  float     interpol_time;
-  int       ticks;
-  int       counter_t;
-  float     x_msi;
-} t_siglp1_t;
-
-t_class *siglp1_t_class;
-
-static void siglp1_t_dsp_tick(t_siglp1_t *x)
-{
-  if(x->counter_t)
-  {
-    if(x->counter_t <= 1)
-    {
-      x->cur_t = x->end_t;
-      x->counter_t = 0;
-    }
-    else
-    {
-      x->counter_t--;
-      x->cur_t += x->delta_t;
-    }
-    if(x->cur_t == 0.0f)
-      x->c1 = 0.0f;
-    else
-      x->c1 = exp((x->sr)/x->cur_t);
-    x->c0 = 1.0f - x->c1;
-  }
-}
-
-static t_int *siglp1_t_perform(t_int *w)
-{
-  float *in = (float *)(w[1]);
-  float *out = (float *)(w[2]);
-  t_siglp1_t *x = (t_siglp1_t *)(w[3]);
-  int i, n = (t_int)(w[4]);
-  float yn0, yn1=x->yn1;
-  float c0=x->c0, c1=x->c1;
-  
-  siglp1_t_dsp_tick(x);
-  for(i=0; i<n; i++)
-  {
-    yn0 = (*in++)*c0 + yn1*c1;
-    *out++ = yn0;
-    yn1 = yn0;
-  }
-  /* NAN protect */
-  if(IEM_DENORMAL(yn1))
-    yn1 = 0.0f;
-  x->yn1 = yn1;
-  return(w+5);
-}
-
-static t_int *siglp1_t_perf8(t_int *w)
-{
-  float *in = (float *)(w[1]);
-  float *out = (float *)(w[2]);
-  t_siglp1_t *x = (t_siglp1_t *)(w[3]);
-  int i, n = (t_int)(w[4]);
-  float yn[9];
-  float c0=x->c0, c1=x->c1;
-  
-  siglp1_t_dsp_tick(x);
-  yn[0] = x->yn1;
-  for(i=0; i<n; i+=8, in+=8, out+=8)
-  {
-    yn[1] = in[0]*c0 + yn[0]*c1;
-    out[0] = yn[1];
-    yn[2] = in[1]*c0 + yn[1]*c1;
-    out[1] = yn[2];
-    yn[3] = in[2]*c0 + yn[2]*c1;
-    out[2] = yn[3];
-    yn[4] = in[3]*c0 + yn[3]*c1;
-    out[3] = yn[4];
-    yn[5] = in[4]*c0 + yn[4]*c1;
-    out[4] = yn[5];
-    yn[6] = in[5]*c0 + yn[5]*c1;
-    out[5] = yn[6];
-    yn[7] = in[6]*c0 + yn[6]*c1;
-    out[6] = yn[7];
-    yn[8] = in[7]*c0 + yn[7]*c1;
-    out[7] = yn[8];
-    yn[0] = yn[8];
-  }
-  /* NAN protect */
-  if(IEM_DENORMAL(yn[0]))
-    yn[0] = 0.0f;
-  
-  x->yn1 = yn[0];
-  return(w+5);
-}
-
-static void siglp1_t_ft2(t_siglp1_t *x, t_floatarg t)
-{
-  int i = (int)((x->ticks_per_interpol_time)*t);
-  
-  x->interpol_time = t;
-  if(i <= 0)
-    i = 1;
-  x->ticks = i;
-  x->rcp_ticks = 1.0f / (float)i;
-}
-
-static void siglp1_t_ft1(t_siglp1_t *x, t_floatarg time_const)
-{
-  if(time_const < 0.0f)
-    time_const = 0.0f;
-  if(time_const != x->cur_t)
-  {
-    x->end_t = time_const;
-    x->counter_t = x->ticks;
-    x->delta_t = (time_const - x->cur_t) * x->rcp_ticks;
-  }
-}
-
-static void siglp1_t_dsp(t_siglp1_t *x, t_signal **sp)
-{
-  int i, n=(int)sp[0]->s_n;
-  
-  x->sr = -1000.0f / (float)(sp[0]->s_sr);
-  x->ticks_per_interpol_time = 0.001f * (float)(sp[0]->s_sr) / (float)n;
-  i = (int)((x->ticks_per_interpol_time)*(x->interpol_time));
-  if(i <= 0)
-    i = 1;
-  x->ticks = i;
-  x->rcp_ticks = 1.0f / (float)i;
-  if(x->cur_t == 0.0f)
-    x->c1 = 0.0f;
-  else
-    x->c1 = exp((x->sr)/x->cur_t);
-  x->c0 = 1.0f - x->c1;
-  if(n&7)
-    dsp_add(siglp1_t_perform, 4, sp[0]->s_vec, sp[1]->s_vec, x, n);
-  else
-    dsp_add(siglp1_t_perf8, 4, sp[0]->s_vec, sp[1]->s_vec, x, n);
-}
-
-static void *siglp1_t_new(t_symbol *s, int argc, t_atom *argv)
-{
-  t_siglp1_t *x = (t_siglp1_t *)pd_new(siglp1_t_class);
-  int i;
-  float time_const=0.0f, interpol=0.0f;
-  
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft2"));
-  outlet_new(&x->x_obj, &s_signal);
-  x->x_msi = 0;
-  x->counter_t = 1;
-  x->delta_t = 0.0f;
-  x->interpol_time = 0.0f;
-  x->yn1 = 0.0f;
-  x->sr = -1.0f / 44.1f;
-  if((argc >= 1)&&IS_A_FLOAT(argv,0))
-    time_const = (float)atom_getfloatarg(0, argc, argv);
-  if((argc >= 2)&&IS_A_FLOAT(argv,1))
-    interpol = (float)atom_getfloatarg(1, argc, argv);
-  if(time_const < 0.0f)
-    time_const = 0.0f;
-  x->cur_t = time_const;
-  if(time_const == 0.0f)
-    x->c1 = 0.0f;
-  else
-    x->c1 = exp((x->sr)/time_const);
-  x->c0 = 1.0f - x->c1;
-  if(interpol < 0.0f)
-    interpol = 0.0f;
-  x->interpol_time = interpol;
-  x->ticks_per_interpol_time = 0.5f;
-  i = (int)((x->ticks_per_interpol_time)*(x->interpol_time));
-  if(i <= 0)
-    i = 1;
-  x->ticks = i;
-  x->rcp_ticks = 1.0f / (float)i;
-  x->end_t = x->cur_t;
-  return (x);
-}
-
-void siglp1_t_setup(void)
-{
-  siglp1_t_class = class_new(gensym("lp1_t~"), (t_newmethod)siglp1_t_new,
-        0, sizeof(t_siglp1_t), 0, A_GIMME, 0);
-  CLASS_MAINSIGNALIN(siglp1_t_class, t_siglp1_t, x_msi);
-  class_addmethod(siglp1_t_class, (t_method)siglp1_t_dsp, gensym("dsp"), 0);
-  class_addmethod(siglp1_t_class, (t_method)siglp1_t_ft1, gensym("ft1"), A_FLOAT, 0);
-  class_addmethod(siglp1_t_class, (t_method)siglp1_t_ft2, gensym("ft2"), A_FLOAT, 0);
-  class_sethelpsymbol(siglp1_t_class, gensym("iemhelp/help-lp1_t~"));
-}
diff --git a/src/iemlib1/sigmov_avrg_kern.c b/src/iemlib1/sigmov_avrg_kern.c
deleted file mode 100644
index dd3e26c..0000000
--- a/src/iemlib1/sigmov_avrg_kern.c
+++ /dev/null
@@ -1,143 +0,0 @@
-/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
-* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
-
-iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
-
-#ifdef _MSC_VER
-#pragma warning( disable : 4244 )
-#pragma warning( disable : 4305 )
-#endif
-
-
-#include "m_pd.h"
-#include "iemlib.h"
-#include <math.h>
-#include <stdio.h>
-#include <string.h>
-
-
-/* -- mov_avrg_kern~ - kernel for a moving-average-filter with IIR - */
-
-typedef struct sigmov_avrg_kern
-{
-  t_object x_obj;
-  double   x_wn1;
-  double   x_a0;
-  double   x_sr;
-  double   x_mstime;
-  int      x_nsamps;
-  int      x_counter;
-  float    x_msi;
-} t_sigmov_avrg_kern;
-
-t_class *sigmov_avrg_kern_class;
-
-static t_int *sigmov_avrg_kern_perform(t_int *w)
-{
-  float *in_direct = (float *)(w[1]);
-  float *in_delayed = (float *)(w[2]);
-  float *out = (float *)(w[3]);
-  t_sigmov_avrg_kern *x = (t_sigmov_avrg_kern *)(w[4]);
-  int i, n = (int)(w[5]);
-  double wn0, wn1=x->x_wn1, a0=x->x_a0;
-  
-  if(x->x_counter)
-  {
-    int counter = x->x_counter;
-    
-    if(counter >= n)
-    {
-      x->x_counter = counter - n;
-      for(i=0; i<n; i++)
-      {
-        wn0 = wn1 + a0*(double)(*in_direct++);
-        *out++ = (float)wn0;
-        wn1 = wn0;
-      }
-    }
-    else
-    {
-      x->x_counter = 0;
-      for(i=0; i<counter; i++)
-      {
-        wn0 = wn1 + a0*(double)(*in_direct++);
-        *out++ = (float)wn0;
-        wn1 = wn0;
-      }
-      for(i=counter; i<n; i++)
-      {
-        wn0 = wn1 + a0*(double)(*in_direct++ - *in_delayed++);
-        *out++ = (float)wn0;
-        wn1 = wn0;
-      }
-    }
-  }
-  else
-  {
-    for(i=0; i<n; i++)
-    {
-      wn0 = wn1 + a0*(double)(*in_direct++ - *in_delayed++);
-      *out++ = (float)wn0;
-      wn1 = wn0;
-    }
-  }
-  x->x_wn1 = wn1;
-  return(w+6);
-}
-
-static void sigmov_avrg_kern_ft1(t_sigmov_avrg_kern *x, t_floatarg mstime)
-{
-  if(mstime < 0.04)
-    mstime = 0.04;
-  x->x_mstime = (double)mstime;
-  x->x_nsamps = (int)(x->x_sr * x->x_mstime);
-  x->x_counter = x->x_nsamps;
-  x->x_wn1 = 0.0;
-  x->x_a0 = 1.0/(double)(x->x_nsamps);
-}
-
-static void sigmov_avrg_kern_reset(t_sigmov_avrg_kern *x)
-{
-  x->x_counter = x->x_nsamps;
-  x->x_wn1 = 0.0;
-}
-
-static void sigmov_avrg_kern_dsp(t_sigmov_avrg_kern *x, t_signal **sp)
-{
-  x->x_sr = 0.001*(double)(sp[0]->s_sr);
-  x->x_nsamps = (int)(x->x_sr * x->x_mstime);
-  x->x_counter = x->x_nsamps;
-  x->x_wn1 = 0.0;
-  x->x_a0 = 1.0/(double)(x->x_nsamps);
-  dsp_add(sigmov_avrg_kern_perform, 5, sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, x, sp[0]->s_n);
-}
-
-static void *sigmov_avrg_kern_new(t_floatarg mstime)
-{
-  t_sigmov_avrg_kern *x = (t_sigmov_avrg_kern *)pd_new(sigmov_avrg_kern_class);
-  
-  if(mstime < 0.04)
-    mstime = 0.04;
-  x->x_mstime = (double)mstime;
-  x->x_sr = 44.1;
-  x->x_nsamps = (int)(x->x_sr * x->x_mstime);
-  x->x_counter = x->x_nsamps;
-  x->x_wn1 = 0.0;
-  x->x_a0 = 1.0/(double)(x->x_nsamps);
-  
-  inlet_new(&x->x_obj,  &x->x_obj.ob_pd, &s_signal, &s_signal);
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
-  outlet_new(&x->x_obj, &s_signal);
-  x->x_msi = 0;
-  return(x);
-}
-
-void sigmov_avrg_kern_setup(void)
-{
-  sigmov_avrg_kern_class = class_new(gensym("mov_avrg_kern~"), (t_newmethod)sigmov_avrg_kern_new,
-        0, sizeof(t_sigmov_avrg_kern), 0, A_FLOAT, 0);
-  CLASS_MAINSIGNALIN(sigmov_avrg_kern_class, t_sigmov_avrg_kern, x_msi);
-  class_addmethod(sigmov_avrg_kern_class, (t_method)sigmov_avrg_kern_dsp, gensym("dsp"), 0);
-  class_addmethod(sigmov_avrg_kern_class, (t_method)sigmov_avrg_kern_ft1, gensym("ft1"), A_FLOAT, 0);
-  class_addmethod(sigmov_avrg_kern_class, (t_method)sigmov_avrg_kern_reset, gensym("reset"), 0);
-}
diff --git a/src/iemlib1/sigpara_bp2.c b/src/iemlib1/sigpara_bp2.c
deleted file mode 100644
index d14d26d..0000000
--- a/src/iemlib1/sigpara_bp2.c
+++ /dev/null
@@ -1,426 +0,0 @@
-/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
-* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
-
-iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
-
-#ifdef _MSC_VER
-#pragma warning( disable : 4244 )
-#pragma warning( disable : 4305 )
-#endif
-
-
-#include "m_pd.h"
-#include "iemlib.h"
-#include <math.h>
-#include <stdio.h>
-#include <string.h>
-
-
-/* ---------- para_bp2~ - parametric bandpass 2. order ----------- */
-
-typedef struct sigpara_bp2
-{
-  t_object x_obj;
-  float wn1;
-  float wn2;
-  float a0;
-  float a1;
-  float a2;
-  float b1;
-  float b2;
-  float sr;
-  float cur_f;
-  float cur_l;
-  float cur_a;
-  float cur_g;
-  float delta_f;
-  float delta_a;
-  float delta_g;
-  float end_f;
-  float end_a;
-  float end_g;
-  float ticks_per_interpol_time;
-  float rcp_ticks;
-  float interpol_time;
-  int   ticks;
-  int   counter_f;
-  int   counter_a;
-  int   counter_g;
-  int   event_mask;
-  void  *x_debug_outlet;
-  t_atom x_at[5];
-  float x_msi;
-} t_sigpara_bp2;
-
-t_class *sigpara_bp2_class;
-
-static void sigpara_bp2_calc(t_sigpara_bp2 *x)
-{
-  float l, al, gal, l2, rcp;
-  
-  l = x->cur_l;
-  l2 = l*l + 1.0;
-  al = l*x->cur_a;
-  gal = al*x->cur_g;
-  rcp = 1.0f/(al + l2);
-  x->a0 = rcp*(l2 + gal);
-  x->a1 = rcp*2.0f*(2.0f - l2);
-  x->a2 = rcp*(l2 - gal);
-  x->b1 = -x->a1;
-  x->b2 = rcp*(al - l2);
-}
-
-static void sigpara_bp2_dsp_tick(t_sigpara_bp2 *x)
-{
-  if(x->event_mask)
-  {
-    float discriminant;
-    
-    if(x->counter_f)
-    {
-      float l, si, co;
-      
-      if(x->counter_f <= 1)
-      {
-        x->cur_f = x->end_f;
-        x->counter_f = 0;
-        x->event_mask &= 6;/*set event_mask_bit 0 = 0*/
-      }
-      else
-      {
-        x->counter_f--;
-        x->cur_f *= x->delta_f;
-      }
-      l = x->cur_f * x->sr;
-      if(l < 1.0e-20f)
-        x->cur_l = 1.0e20f;
-      else if(l > 1.57079632f)
-        x->cur_l = 0.0f;
-      else
-      {
-        si = sin(l);
-        co = cos(l);
-        x->cur_l = co/si;
-      }
-    }
-    if(x->counter_a)
-    {
-      if(x->counter_a <= 1)
-      {
-        x->cur_a = x->end_a;
-        x->counter_a = 0;
-        x->event_mask &= 5;/*set event_mask_bit 1 = 0*/
-      }
-      else
-      {
-        x->counter_a--;
-        x->cur_a *= x->delta_a;
-      }
-    }
-    if(x->counter_g)
-    {
-      if(x->counter_g <= 1)
-      {
-        x->cur_g = x->end_g;
-        x->counter_g = 0;
-        x->event_mask &= 3;/*set event_mask_bit 2 = 0*/
-      }
-      else
-      {
-        x->counter_g--;
-        x->cur_g *= x->delta_g;
-      }
-    }
-    
-    sigpara_bp2_calc(x);
-    
-    /* stability check */
-    
-    discriminant = x->b1 * x->b1 + 4.0f * x->b2;
-    if(x->b1 <= -1.9999996f)
-      x->b1 = -1.9999996f;
-    else if(x->b1 >= 1.9999996f)
-      x->b1 = 1.9999996f;
-    
-    if(x->b2 <= -0.9999998f)
-      x->b2 = -0.9999998f;
-    else if(x->b2 >= 0.9999998f)
-      x->b2 = 0.9999998f;
-    
-    if(discriminant >= 0.0f)
-    {
-      if(0.9999998f - x->b1 - x->b2 < 0.0f)
-        x->b2 = 0.9999998f - x->b1;
-      if(0.9999998f + x->b1 - x->b2 < 0.0f)
-        x->b2 = 0.9999998f + x->b1;
-    }
-  }
-}
-
-static t_int *sigpara_bp2_perform(t_int *w)
-{
-  float *in = (float *)(w[1]);
-  float *out = (float *)(w[2]);
-  t_sigpara_bp2 *x = (t_sigpara_bp2 *)(w[3]);
-  int i, n = (t_int)(w[4]);
-  float wn0, wn1=x->wn1, wn2=x->wn2;
-  float a0=x->a0, a1=x->a1, a2=x->a2;
-  float b1=x->b1, b2=x->b2;
-  
-  sigpara_bp2_dsp_tick(x);
-  for(i=0; i<n; i++)
-  {
-    wn0 = *in++ + b1*wn1 + b2*wn2;
-    *out++ = a0*wn0 + a1*wn1 + a2*wn2;
-    wn2 = wn1;
-    wn1 = wn0;
-  }
-  /* NAN protect */
-  if(IEM_DENORMAL(wn2))
-    wn2 = 0.0f;
-  if(IEM_DENORMAL(wn1))
-    wn1 = 0.0f;
-  
-  x->wn1 = wn1;
-  x->wn2 = wn2;
-  return(w+5);
-}
-/*   yn0 = *out;
-xn0 = *in;
-*************
-yn0 = a0*xn0 + a1*xn1 + a2*xn2 + b1*yn1 + b2*yn2;
-yn2 = yn1;
-yn1 = yn0;
-xn2 = xn1;
-xn1 = xn0;
-*************************
-y/x = (a0 + a1*z-1 + a2*z-2)/(1 - b1*z-1 - b2*z-2);*/
-
-static t_int *sigpara_bp2_perf8(t_int *w)
-{
-  float *in = (float *)(w[1]);
-  float *out = (float *)(w[2]);
-  t_sigpara_bp2 *x = (t_sigpara_bp2 *)(w[3]);
-  int i, n = (t_int)(w[4]);
-  float wn[10];
-  float a0=x->a0, a1=x->a1, a2=x->a2;
-  float b1=x->b1, b2=x->b2;
-  
-  sigpara_bp2_dsp_tick(x);
-  wn[0] = x->wn2;
-  wn[1] = x->wn1;
-  for(i=0; i<n; i+=8, in+=8, out+=8)
-  {
-    wn[2] = in[0] + b1*wn[1] + b2*wn[0];
-    out[0] = a0*wn[2] + a1*wn[1] + a2*wn[0];
-    wn[3] = in[1] + b1*wn[2] + b2*wn[1];
-    out[1] = a0*wn[3] + a1*wn[2] + a2*wn[1];
-    wn[4] = in[2] + b1*wn[3] + b2*wn[2];
-    out[2] = a0*wn[4] + a1*wn[3] + a2*wn[2];
-    wn[5] = in[3] + b1*wn[4] + b2*wn[3];
-    out[3] = a0*wn[5] + a1*wn[4] + a2*wn[3];
-    wn[6] = in[4] + b1*wn[5] + b2*wn[4];
-    out[4] = a0*wn[6] + a1*wn[5] + a2*wn[4];
-    wn[7] = in[5] + b1*wn[6] + b2*wn[5];
-    out[5] = a0*wn[7] + a1*wn[6] + a2*wn[5];
-    wn[8] = in[6] + b1*wn[7] + b2*wn[6];
-    out[6] = a0*wn[8] + a1*wn[7] + a2*wn[6];
-    wn[9] = in[7] + b1*wn[8] + b2*wn[7];
-    out[7] = a0*wn[9] + a1*wn[8] + a2*wn[7];
-    wn[0] = wn[8];
-    wn[1] = wn[9];
-  }
-  /* NAN protect */
-  if(IEM_DENORMAL(wn[0]))
-    wn[0] = 0.0f;
-  if(IEM_DENORMAL(wn[1]))
-    wn[1] = 0.0f;
-  
-  x->wn1 = wn[1];
-  x->wn2 = wn[0];
-  return(w+5);
-}
-
-static void sigpara_bp2_ft4(t_sigpara_bp2 *x, t_floatarg t)
-{
-  int i = (int)((x->ticks_per_interpol_time)*t);
-  
-  x->interpol_time = t;
-  if(i <= 0)
-    i = 1;
-  x->ticks = i;
-  x->rcp_ticks = 1.0f / (float)i;
-}
-
-static void sigpara_bp2_ft3(t_sigpara_bp2 *x, t_floatarg l)
-{
-  float g = exp(0.11512925465 * l);
-  
-  if(g != x->cur_g)
-  {
-    x->end_g = g;
-    x->counter_g = x->ticks;
-    x->delta_g = exp(log(g/x->cur_g)*x->rcp_ticks);
-    x->event_mask |= 4;/*set event_mask_bit 2 = 1*/
-  }
-}
-
-static void sigpara_bp2_ft2(t_sigpara_bp2 *x, t_floatarg q)
-{
-  float a;
-  
-  if(q <= 0.0f)
-    q = 0.000001f;
-  a = 1.0f/q;
-  if(a != x->cur_a)
-  {
-    x->end_a = a;
-    x->counter_a = x->ticks;
-    x->delta_a = exp(log(a/x->cur_a)*x->rcp_ticks);
-    x->event_mask |= 2;/*set event_mask_bit 1 = 1*/
-  }
-}
-
-static void sigpara_bp2_ft1(t_sigpara_bp2 *x, t_floatarg f)
-{
-  if(f <= 0.0f)
-    f = 0.000001f;
-  if(f != x->cur_f)
-  {
-    x->end_f = f;
-    x->counter_f = x->ticks;
-    x->delta_f = exp(log(f/x->cur_f)*x->rcp_ticks);
-    x->event_mask |= 1;/*set event_mask_bit 0 = 1*/
-  }
-}
-
-static void sigpara_bp2_print(t_sigpara_bp2 *x)
-{
-  //  post("fb1 = %g, fb2 = %g, ff1 = %g, ff2 = %g, ff3 = %g", x->b1, x->b2, x->a0, x->a1, x->a2);
-  x->x_at[0].a_w.w_float = x->b1;
-  x->x_at[1].a_w.w_float = x->b2;
-  x->x_at[2].a_w.w_float = x->a0;
-  x->x_at[3].a_w.w_float = x->a1;
-  x->x_at[4].a_w.w_float = x->a2;
-  outlet_list(x->x_debug_outlet, &s_list, 5, x->x_at);
-}
-
-static void sigpara_bp2_dsp(t_sigpara_bp2 *x, t_signal **sp)
-{
-  float si, co, f;
-  int i, n=(int)sp[0]->s_n;
-  
-  x->sr = 3.14159265358979323846f / (float)(sp[0]->s_sr);
-  x->ticks_per_interpol_time = 0.001f * (float)(sp[0]->s_sr) / (float)n;
-  i = (int)((x->ticks_per_interpol_time)*(x->interpol_time));
-  if(i <= 0)
-    i = 1;
-  x->ticks = i;
-  x->rcp_ticks = 1.0f / (float)i;
-  f = x->cur_f * x->sr;
-  if(f < 1.0e-20f)
-    x->cur_l = 1.0e20f;
-  else if(f > 1.57079632f)
-    x->cur_l = 0.0f;
-  else
-  {
-    si = sin(f);
-    co = cos(f);
-    x->cur_l = co/si;
-  }
-  if(n&7)
-    dsp_add(sigpara_bp2_perform, 4, sp[0]->s_vec, sp[1]->s_vec, x, n);
-  else
-    dsp_add(sigpara_bp2_perf8, 4, sp[0]->s_vec, sp[1]->s_vec, x, n);
-}
-
-static void *sigpara_bp2_new(t_symbol *s, int argc, t_atom *argv)
-{
-  t_sigpara_bp2 *x = (t_sigpara_bp2 *)pd_new(sigpara_bp2_class);
-  int i;
-  float si, co, f=0.0, q=1.0, l=0.0, interpol=0.0;
-  
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft2"));
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft3"));
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft4"));
-  outlet_new(&x->x_obj, &s_signal);
-  x->x_debug_outlet = outlet_new(&x->x_obj, &s_list);
-  x->x_msi = 0;
-  
-  x->x_at[0].a_type = A_FLOAT;
-  x->x_at[1].a_type = A_FLOAT;
-  x->x_at[2].a_type = A_FLOAT;
-  x->x_at[3].a_type = A_FLOAT;
-  x->x_at[4].a_type = A_FLOAT;
-  
-  x->event_mask = 1;
-  x->counter_f = 1;
-  x->counter_a = 0;
-  x->counter_g = 0;
-  x->delta_f = 0.0f;
-  x->delta_a = 0.0f;
-  x->delta_g = 0.0f;
-  x->interpol_time = 500.0f;
-  x->wn1 = 0.0;
-  x->wn2 = 0.0;
-  x->a0 = 0.0;
-  x->a1 = 0.0;
-  x->a2 = 0.0;
-  x->b1 = 0.0;
-  x->b2 = 0.0;
-  x->sr = 3.14159265358979323846f / 44100.0f;
-  x->cur_a = 1.0;
-  if((argc == 4)&&IS_A_FLOAT(argv,3)&&IS_A_FLOAT(argv,2)&&IS_A_FLOAT(argv,1)&&IS_A_FLOAT(argv,0))
-  {
-    f = (float)atom_getfloatarg(0, argc, argv);
-    q = (float)atom_getfloatarg(1, argc, argv);
-    l = (float)atom_getfloatarg(2, argc, argv);
-    interpol = (float)atom_getfloatarg(3, argc, argv);
-  }
-  if(f <= 0.0f)
-    f = 0.000001f;
-  x->cur_f = f;
-  f *= x->sr;
-  if(f < 1.0e-20f)
-    x->cur_l = 1.0e20f;
-  else if(f > 1.57079632f)
-    x->cur_l = 0.0f;
-  else
-  {
-    si = sin(f);
-    co = cos(f);
-    x->cur_l = co/si;
-  }
-  if(q <= 0.0f)
-    q = 0.000001f;
-  x->cur_a = 1.0f/q;
-  x->cur_g = exp(0.11512925465 * l);
-  if(interpol <= 0.0f)
-    interpol = 0.0f;
-  x->interpol_time = interpol;
-  x->ticks_per_interpol_time = 0.5f;
-  i = (int)((x->ticks_per_interpol_time)*(x->interpol_time));
-  if(i <= 0)
-    i = 1;
-  x->ticks = i;
-  x->rcp_ticks = 1.0f / (float)i;
-  x->end_f = x->cur_f;
-  x->end_a = x->cur_a;
-  x->end_g = x->cur_g;
-  return(x);
-}
-
-void sigpara_bp2_setup(void)
-{
-  sigpara_bp2_class = class_new(gensym("para_bp2~"), (t_newmethod)sigpara_bp2_new,
-        0, sizeof(t_sigpara_bp2), 0, A_GIMME, 0);
-  CLASS_MAINSIGNALIN(sigpara_bp2_class, t_sigpara_bp2, x_msi);
-  class_addmethod(sigpara_bp2_class, (t_method)sigpara_bp2_dsp, gensym("dsp"), 0);
-  class_addmethod(sigpara_bp2_class, (t_method)sigpara_bp2_ft1, gensym("ft1"), A_FLOAT, 0);
-  class_addmethod(sigpara_bp2_class, (t_method)sigpara_bp2_ft2, gensym("ft2"), A_FLOAT, 0);
-  class_addmethod(sigpara_bp2_class, (t_method)sigpara_bp2_ft3, gensym("ft3"), A_FLOAT, 0);
-  class_addmethod(sigpara_bp2_class, (t_method)sigpara_bp2_ft4, gensym("ft4"), A_FLOAT, 0);
-  class_addmethod(sigpara_bp2_class, (t_method)sigpara_bp2_print, gensym("print"), 0);
-  class_sethelpsymbol(sigpara_bp2_class, gensym("iemhelp/help-para_bp2~"));
-}
diff --git a/src/iemlib1/sigpeakenv.c b/src/iemlib1/sigpeakenv.c
deleted file mode 100644
index 95b465f..0000000
--- a/src/iemlib1/sigpeakenv.c
+++ /dev/null
@@ -1,102 +0,0 @@
-/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
-* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
-
-iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
-
-#ifdef _MSC_VER
-#pragma warning( disable : 4244 )
-#pragma warning( disable : 4305 )
-#endif
-
-
-#include "m_pd.h"
-#include "iemlib.h"
-#include <math.h>
-#include <stdio.h>
-#include <string.h>
-
-/* ---------------- peakenv~ - simple peak-envelope-converter. ----------------- */
-
-typedef struct sigpeakenv
-{
-  t_object x_obj;
-  float    x_sr;
-  float    x_old_peak;
-  float    x_c1;
-  float    x_releasetime;
-  float    x_msi;
-} t_sigpeakenv;
-
-t_class *sigpeakenv_class;
-
-static void sigpeakenv_reset(t_sigpeakenv *x)
-{
-  x->x_old_peak = 0.0f;
-}
-
-static void sigpeakenv_ft1(t_sigpeakenv *x, t_floatarg f)/* release-time in ms */
-{
-  if(f < 0.0f)
-    f = 0.0f;
-  x->x_releasetime = f;
-  x->x_c1 = exp(-1.0/(x->x_sr*0.001*x->x_releasetime));
-}
-
-static t_int *sigpeakenv_perform(t_int *w)
-{
-  float *in = (float *)(w[1]);
-  float *out = (float *)(w[2]);
-  t_sigpeakenv *x = (t_sigpeakenv *)(w[3]);
-  int n = (int)(w[4]);
-  float peak = x->x_old_peak;
-  float c1 = x->x_c1;
-  float absolute;
-  int i;
-  
-  for(i=0; i<n; i++)
-  {
-    absolute = fabs(*in++);
-    peak *= c1;
-    if(absolute > peak)
-      peak = absolute;
-    *out++ = peak;
-  }
-  /* NAN protect */
-  if(IEM_DENORMAL(peak))
-    peak = 0.0f;
-  x->x_old_peak = peak;
-  return(w+5);
-}
-
-static void sigpeakenv_dsp(t_sigpeakenv *x, t_signal **sp)
-{
-  x->x_sr = (float)sp[0]->s_sr;
-  sigpeakenv_ft1(x, x->x_releasetime);
-  dsp_add(sigpeakenv_perform, 4, sp[0]->s_vec, sp[1]->s_vec, x, sp[0]->s_n);
-}
-
-static void *sigpeakenv_new(t_floatarg f)
-{
-  t_sigpeakenv *x = (t_sigpeakenv *)pd_new(sigpeakenv_class);
-  
-  if(f <= 0.0f)
-    f = 0.0f;
-  x->x_sr = 44100.0f;
-  sigpeakenv_ft1(x, f);
-  x->x_old_peak = 0.0f;
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
-  outlet_new(&x->x_obj, &s_signal);
-  x->x_msi = 0;
-  return(x);
-}
-
-void sigpeakenv_setup(void)
-{
-  sigpeakenv_class = class_new(gensym("peakenv~"), (t_newmethod)sigpeakenv_new,
-    0, sizeof(t_sigpeakenv), 0, A_DEFFLOAT, 0);
-  CLASS_MAINSIGNALIN(sigpeakenv_class, t_sigpeakenv, x_msi);
-  class_addmethod(sigpeakenv_class, (t_method)sigpeakenv_dsp, gensym("dsp"), 0);
-  class_addmethod(sigpeakenv_class, (t_method)sigpeakenv_ft1, gensym("ft1"), A_FLOAT, 0);
-  class_addmethod(sigpeakenv_class, (t_method)sigpeakenv_reset, gensym("reset"), 0);
-  class_sethelpsymbol(sigpeakenv_class, gensym("iemhelp/help-peakenv~"));
-}
diff --git a/src/iemlib1/sigprvu.c b/src/iemlib1/sigprvu.c
deleted file mode 100644
index b33d3d3..0000000
--- a/src/iemlib1/sigprvu.c
+++ /dev/null
@@ -1,282 +0,0 @@
-/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
-* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
-
-iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
-
-#ifdef _MSC_VER
-#pragma warning( disable : 4244 )
-#pragma warning( disable : 4305 )
-#endif
-
-
-#include "m_pd.h"
-#include "iemlib.h"
-#include <math.h>
-#include <stdio.h>
-#include <string.h>
-
-/* ---------------- prvu~ - simple peak&rms-vu-meter. ----------------- */
-
-typedef struct sigprvu
-{
-  t_object  x_obj;
-  t_atom    x_at[3];
-  void      *x_clock_metro;
-  int       x_metro_time;
-  void      *x_clock_hold;
-  int       x_hold_time;
-  float     x_cur_peak;
-  float     x_old_peak;
-  float     x_hold_peak;
-  int       x_hold;
-  float     x_sum_rms;
-  float     x_old_rms;
-  float     x_rcp;
-  float     x_sr;
-  float     x_threshold_over;
-  int       x_overflow_counter;
-  float     x_release_time;
-  float     x_c1;
-  int       x_started;
-  float     x_msi;
-} t_sigprvu;
-
-t_class *sigprvu_class;
-static void sigprvu_tick_metro(t_sigprvu *x);
-static void sigprvu_tick_hold(t_sigprvu *x);
-
-static void sigprvu_reset(t_sigprvu *x)
-{
-  x->x_at[0].a_w.w_float = -99.9f;
-  x->x_at[1].a_w.w_float = -99.9f;
-  x->x_at[2].a_w.w_float = 0.0f;
-  outlet_list(x->x_obj.ob_outlet, &s_list, 3, x->x_at);
-  x->x_overflow_counter = 0;
-  x->x_cur_peak = 0.0f;
-  x->x_old_peak = 0.0f;
-  x->x_hold_peak = 0.0f;
-  x->x_sum_rms = 0.0f;
-  x->x_old_rms = 0.0f;
-  x->x_hold = 0;
-  clock_unset(x->x_clock_hold);
-  clock_delay(x->x_clock_metro, x->x_metro_time);
-}
-
-static void sigprvu_stop(t_sigprvu *x)
-{
-  clock_unset(x->x_clock_metro);
-  x->x_started = 0;
-}
-
-static void sigprvu_start(t_sigprvu *x)
-{
-  clock_delay(x->x_clock_metro, x->x_metro_time);
-  x->x_started = 1;
-}
-
-static void sigprvu_float(t_sigprvu *x, t_floatarg f)
-{
-  if(f == 0.0)
-  {
-    clock_unset(x->x_clock_metro);
-    x->x_started = 0;
-  }
-  else
-  {
-    clock_delay(x->x_clock_metro, x->x_metro_time);
-    x->x_started = 1;
-  }
-}
-
-static void sigprvu_t_release(t_sigprvu *x, t_floatarg release_time)
-{
-  if(release_time <= 20.0f)
-    release_time = 20.0f;
-  x->x_release_time = release_time;
-  x->x_c1 = exp(-2.0*(float)x->x_metro_time/x->x_release_time);
-}
-
-static void sigprvu_t_metro(t_sigprvu *x, t_floatarg metro_time)
-{
-  if(metro_time <= 20.0f)
-    metro_time = 20.0f;
-  x->x_metro_time = (int)metro_time;
-  x->x_c1 = exp(-2.0*(float)x->x_metro_time/x->x_release_time);
-  x->x_rcp = 1.0f/(x->x_sr*(float)x->x_metro_time);
-}
-
-static void sigprvu_t_hold(t_sigprvu *x, t_floatarg hold_time)
-{
-  if(hold_time <= 20.0f)
-    hold_time = 20.0f;
-  x->x_hold_time = (int)hold_time;
-}
-
-static void sigprvu_threshold(t_sigprvu *x, t_floatarg thresh)
-{
-  x->x_threshold_over = thresh;
-}
-
-static t_int *sigprvu_perform(t_int *w)
-{
-  float *in = (float *)(w[1]);
-  t_sigprvu *x = (t_sigprvu *)(w[2]);
-  int n = (int)(w[3]);
-  float peak = x->x_cur_peak, pow, sum=x->x_sum_rms;
-  int i;
-  
-  if(x->x_started)
-  {
-    for(i=0; i<n; i++)
-    {
-      pow = in[i]*in[i];
-      if(pow > peak)
-        peak = pow;
-      sum += pow;
-    }
-    x->x_cur_peak = peak;
-    x->x_sum_rms = sum;
-  }
-  return(w+4);
-}
-
-static void sigprvu_dsp(t_sigprvu *x, t_signal **sp)
-{
-  x->x_sr = 0.001*(float)sp[0]->s_sr;
-  x->x_rcp = 1.0f/(x->x_sr*(float)x->x_metro_time);
-  dsp_add(sigprvu_perform, 3, sp[0]->s_vec, x, sp[0]->s_n);
-  clock_delay(x->x_clock_metro, x->x_metro_time);
-}
-
-static void sigprvu_tick_hold(t_sigprvu *x)
-{
-  x->x_hold = 0;
-  x->x_hold_peak = x->x_old_peak;
-}
-
-static void sigprvu_tick_metro(t_sigprvu *x)
-{
-  float dbr, dbp, cur_rms, c1=x->x_c1;
-  
-  x->x_old_peak *= c1;
-  /* NAN protect */
-  if(IEM_DENORMAL(x->x_old_peak))
-    x->x_old_peak = 0.0f;
-  
-  if(x->x_cur_peak > x->x_old_peak)
-    x->x_old_peak = x->x_cur_peak;
-  if(x->x_old_peak > x->x_hold_peak)
-  {
-    x->x_hold = 1;
-    x->x_hold_peak = x->x_old_peak;
-    clock_delay(x->x_clock_hold, x->x_hold_time);
-  }
-  if(!x->x_hold)
-    x->x_hold_peak = x->x_old_peak;
-  if(x->x_hold_peak <= 0.0000000001f)
-    dbp = -99.9f;
-  else if(x->x_hold_peak > 1000000.0f)
-  {
-    dbp = 60.0f;
-    x->x_hold_peak = 1000000.0f;
-    x->x_old_peak = 1000000.0f;
-  }
-  else
-    dbp = 4.3429448195f*log(x->x_hold_peak);
-  x->x_cur_peak = 0.0f;
-  if(dbp >= x->x_threshold_over)
-    x->x_overflow_counter++;
-  x->x_at[1].a_w.w_float = dbp;
-  x->x_at[2].a_w.w_float = (float)x->x_overflow_counter;
-  
-  cur_rms = (1.0f - c1)*x->x_sum_rms*x->x_rcp + c1*x->x_old_rms;
-  /* NAN protect */
-  if(IEM_DENORMAL(cur_rms))
-    cur_rms = 0.0f;
-  
-  if(cur_rms <= 0.0000000001f)
-    dbr = -99.9f;
-  else if(cur_rms > 1000000.0f)
-  {
-    dbr = 60.0f;
-    x->x_old_rms = 1000000.0f;
-  }
-  else
-    dbr = 4.3429448195f*log(cur_rms);
-  x->x_sum_rms = 0.0f;
-  x->x_old_rms = cur_rms;
-  x->x_at[0].a_w.w_float = dbr;
-  outlet_list(x->x_obj.ob_outlet, &s_list, 3, x->x_at);
-  clock_delay(x->x_clock_metro, x->x_metro_time);
-}
-
-static void sigprvu_ff(t_sigprvu *x)
-{
-  clock_free(x->x_clock_metro);
-  clock_free(x->x_clock_hold);
-}
-
-static void *sigprvu_new(t_floatarg metro_time, t_floatarg hold_time,
-                         t_floatarg release_time, t_floatarg threshold)
-{
-  t_sigprvu *x;
-  float t;
-  int i;
-  
-  x = (t_sigprvu *)pd_new(sigprvu_class);
-  if(metro_time <= 0.0f)
-    metro_time = 300.0f;
-  if(metro_time <= 20.0f)
-    metro_time = 20.0f;
-  if(release_time <= 0.0f)
-    release_time = 300.0f;
-  if(release_time <= 20.0f)
-    release_time = 20.0f;
-  if(hold_time <= 0.0f)
-    hold_time = 1000.0f;
-  if(hold_time <= 20.0f)
-    hold_time = 20.0f;
-  if(threshold == 0.0f)
-    threshold = -0.01f;
-  x->x_metro_time = (int)metro_time;
-  x->x_release_time = release_time;
-  x->x_hold_time = (int)hold_time;
-  x->x_threshold_over = threshold;
-  x->x_c1 = exp(-2.0*(float)x->x_metro_time/x->x_release_time);
-  x->x_cur_peak = 0.0f;
-  x->x_old_peak = 0.0f;
-  x->x_hold_peak = 0.0f;
-  x->x_hold = 0;
-  x->x_sum_rms = 0.0f;
-  x->x_old_rms = 0.0f;
-  x->x_sr = 44.1f;
-  x->x_rcp = 1.0f/(x->x_sr*(float)x->x_metro_time);
-  x->x_overflow_counter = 0;
-  x->x_clock_metro = clock_new(x, (t_method)sigprvu_tick_metro);
-  x->x_clock_hold = clock_new(x, (t_method)sigprvu_tick_hold);
-  x->x_started = 1;
-  outlet_new(&x->x_obj, &s_list);
-  x->x_at[0].a_type = A_FLOAT;
-  x->x_at[1].a_type = A_FLOAT;
-  x->x_at[2].a_type = A_FLOAT;
-  x->x_msi = 0.0f;
-  return(x);
-}
-
-void sigprvu_setup(void)
-{
-  sigprvu_class = class_new(gensym("prvu~"), (t_newmethod)sigprvu_new,
-    (t_method)sigprvu_ff, sizeof(t_sigprvu), 0,
-    A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0);
-  CLASS_MAINSIGNALIN(sigprvu_class, t_sigprvu, x_msi);
-  class_addmethod(sigprvu_class, (t_method)sigprvu_dsp, gensym("dsp"), 0);
-  class_addfloat(sigprvu_class, sigprvu_float);
-  class_addmethod(sigprvu_class, (t_method)sigprvu_reset, gensym("reset"), 0);
-  class_addmethod(sigprvu_class, (t_method)sigprvu_start, gensym("start"), 0);
-  class_addmethod(sigprvu_class, (t_method)sigprvu_stop, gensym("stop"), 0);
-  class_addmethod(sigprvu_class, (t_method)sigprvu_t_release, gensym("t_release"), A_FLOAT, 0);
-  class_addmethod(sigprvu_class, (t_method)sigprvu_t_metro, gensym("t_metro"), A_FLOAT, 0);
-  class_addmethod(sigprvu_class, (t_method)sigprvu_t_hold, gensym("t_hold"), A_FLOAT, 0);
-  class_addmethod(sigprvu_class, (t_method)sigprvu_threshold, gensym("threshold"), A_FLOAT, 0);
-  class_sethelpsymbol(sigprvu_class, gensym("iemhelp/help-prvu~"));
-}
diff --git a/src/iemlib1/sigpvu.c b/src/iemlib1/sigpvu.c
deleted file mode 100644
index d1caeb4..0000000
--- a/src/iemlib1/sigpvu.c
+++ /dev/null
@@ -1,206 +0,0 @@
-/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
-* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
-
-iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
-
-#ifdef _MSC_VER
-#pragma warning( disable : 4244 )
-#pragma warning( disable : 4305 )
-#endif
-
-
-#include "m_pd.h"
-#include "iemlib.h"
-#include <math.h>
-#include <stdio.h>
-#include <string.h>
-
-/* ---------------- pvu~ - simple peak-vu-meter. ----------------- */
-
-typedef struct sigpvu
-{
-  t_object  x_obj;
-  void      *x_outlet_meter;
-  void      *x_outlet_over;
-  void      *x_clock;
-  float     x_cur_peak;
-  float     x_old_peak;
-  float     x_threshold_over;
-  float     x_c1;
-  int       x_metro_time;
-  float     x_release_time;
-  int       x_overflow_counter;
-  int       x_started;
-  float     x_msi;
-} t_sigpvu;
-
-t_class *sigpvu_class;
-static void sigpvu_tick(t_sigpvu *x);
-
-static void sigpvu_reset(t_sigpvu *x)
-{
-  outlet_float(x->x_outlet_over, (t_float)0);
-  outlet_float(x->x_outlet_meter, -199.9);
-  x->x_overflow_counter = 0;
-  x->x_cur_peak = 0.0f;
-  x->x_old_peak = 0.0f;
-  clock_delay(x->x_clock, x->x_metro_time);
-}
-
-static void sigpvu_stop(t_sigpvu *x)
-{
-  clock_unset(x->x_clock);
-  x->x_started = 0;
-}
-
-static void sigpvu_start(t_sigpvu *x)
-{
-  clock_delay(x->x_clock, x->x_metro_time);
-  x->x_started = 1;
-}
-
-static void sigpvu_float(t_sigpvu *x, t_floatarg f)
-{
-  if(f == 0.0)
-  {
-    clock_unset(x->x_clock);
-    x->x_started = 0;
-  }
-  else
-  {
-    clock_delay(x->x_clock, x->x_metro_time);
-    x->x_started = 1;
-  }
-}
-
-static void sigpvu_t_release(t_sigpvu *x, t_floatarg release_time)
-{
-  if(release_time <= 20.0f)
-    release_time = 20.0f;
-  x->x_release_time = release_time;
-  x->x_c1 = exp(-(float)x->x_metro_time/(float)release_time);
-}
-
-static void sigpvu_t_metro(t_sigpvu *x, t_floatarg metro_time)
-{
-  if(metro_time <= 20.0f)
-    metro_time = 20.0f;
-  x->x_metro_time = (int)metro_time;
-  x->x_c1 = exp(-(float)metro_time/(float)x->x_release_time);
-}
-
-static void sigpvu_threshold(t_sigpvu *x, t_floatarg thresh)
-{
-  x->x_threshold_over = thresh;
-}
-
-static t_int *sigpvu_perform(t_int *w)
-{
-  float *in = (float *)(w[1]);
-  t_sigpvu *x = (t_sigpvu *)(w[2]);
-  int n = (int)(w[3]);
-  float peak = x->x_cur_peak;
-  float absolute;
-  int i;
-  
-  if(x->x_started)
-  {
-    for(i=0; i<n; i++)
-    {
-      absolute = fabs(*in++);
-      if(absolute > peak)
-        peak = absolute;
-    }
-    x->x_cur_peak = peak;
-  }
-  return(w+4);
-}
-
-static void sigpvu_dsp(t_sigpvu *x, t_signal **sp)
-{
-  dsp_add(sigpvu_perform, 3, sp[0]->s_vec, x, sp[0]->s_n);
-  clock_delay(x->x_clock, x->x_metro_time);
-}
-
-static void sigpvu_tick(t_sigpvu *x)
-{
-  float db;
-  int i;
-  
-  x->x_old_peak *= x->x_c1;
-  /* NAN protect */
-  if(IEM_DENORMAL(x->x_old_peak))
-    x->x_old_peak = 0.0f;
-  
-  if(x->x_cur_peak > x->x_old_peak)
-    x->x_old_peak = x->x_cur_peak;
-  if(x->x_old_peak <= 0.0000000001f)
-    db = -199.9f;
-  else if(x->x_old_peak > 1000000.0f)
-  {
-    db = 120.0f;
-    x->x_old_peak = 1000000.0f;
-  }
-  else
-    db = 8.6858896381f*log(x->x_old_peak);
-  if(db >= x->x_threshold_over)
-  {
-    x->x_overflow_counter++;
-    outlet_float(x->x_outlet_over, (t_float)x->x_overflow_counter);
-  }
-  outlet_float(x->x_outlet_meter, db);
-  x->x_cur_peak = 0.0f;
-  clock_delay(x->x_clock, x->x_metro_time);
-}
-
-static void *sigpvu_new(t_floatarg metro_time, t_floatarg release_time, t_floatarg threshold)
-{
-  t_sigpvu *x;
-  float t;
-  
-  x = (t_sigpvu *)pd_new(sigpvu_class);
-  if(metro_time <= 0.0f)
-    metro_time = 300.0f;
-  if(metro_time <= 20.0f)
-    metro_time = 20.0f;
-  if(release_time <= 0.0f)
-    release_time = 300.0f;
-  if(release_time <= 20.0f)
-    release_time = 20.0f;
-  if(threshold == 0.0f)
-    threshold = -0.01f;
-  x->x_threshold_over = threshold;
-  x->x_overflow_counter = 0;
-  x->x_metro_time = (int)metro_time;
-  x->x_release_time = release_time;
-  x->x_c1 = exp(-(float)metro_time/(float)release_time);
-  x->x_cur_peak = 0.0f;
-  x->x_old_peak = 0.0f;
-  x->x_clock = clock_new(x, (t_method)sigpvu_tick);
-  x->x_outlet_meter = outlet_new(&x->x_obj, &s_float);/* left */
-  x->x_outlet_over = outlet_new(&x->x_obj, &s_float); /* right */
-  x->x_started = 1;
-  x->x_msi = 0;
-  return(x);
-}
-
-static void sigpvu_ff(t_sigpvu *x)
-{
-  clock_free(x->x_clock);
-}
-
-void sigpvu_setup(void )
-{
-  sigpvu_class = class_new(gensym("pvu~"), (t_newmethod)sigpvu_new,
-    (t_method)sigpvu_ff, sizeof(t_sigpvu), 0, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0);
-  CLASS_MAINSIGNALIN(sigpvu_class, t_sigpvu, x_msi);
-  class_addmethod(sigpvu_class, (t_method)sigpvu_dsp, gensym("dsp"), 0);
-  class_addfloat(sigpvu_class, sigpvu_float);
-  class_addmethod(sigpvu_class, (t_method)sigpvu_reset, gensym("reset"), 0);
-  class_addmethod(sigpvu_class, (t_method)sigpvu_start, gensym("start"), 0);
-  class_addmethod(sigpvu_class, (t_method)sigpvu_stop, gensym("stop"), 0);
-  class_addmethod(sigpvu_class, (t_method)sigpvu_t_release, gensym("t_release"), A_FLOAT, 0);
-  class_addmethod(sigpvu_class, (t_method)sigpvu_t_metro, gensym("t_metro"), A_FLOAT, 0);
-  class_addmethod(sigpvu_class, (t_method)sigpvu_threshold, gensym("threshold"), A_FLOAT, 0);
-  class_sethelpsymbol(sigpvu_class, gensym("iemhelp/help-pvu~"));
-}
diff --git a/src/iemlib1/sigrvu.c b/src/iemlib1/sigrvu.c
deleted file mode 100644
index d579a3f..0000000
--- a/src/iemlib1/sigrvu.c
+++ /dev/null
@@ -1,187 +0,0 @@
-/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
-* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
-
-iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
-
-#ifdef _MSC_VER
-#pragma warning( disable : 4244 )
-#pragma warning( disable : 4305 )
-#endif
-
-
-#include "m_pd.h"
-#include "iemlib.h"
-#include <math.h>
-#include <stdio.h>
-#include <string.h>
-
-/* ---------------- rvu~ - simple peak&rms-vu-meter. ----------------- */
-
-typedef struct sigrvu
-{
-  t_object  x_obj;
-  void      *x_clock_metro;
-  int       x_metro_time;
-  float     x_sum_rms;
-  float     x_old_rms;
-  float     x_rcp;
-  float     x_sr;
-  float     x_release_time;
-  float     x_c1;
-  int       x_started;
-  float     x_msi;
-} t_sigrvu;
-
-t_class *sigrvu_class;
-static void sigrvu_tick_metro(t_sigrvu *x);
-
-static void sigrvu_reset(t_sigrvu *x)
-{
-  outlet_float(x->x_obj.ob_outlet, -99.9f);
-  x->x_sum_rms = 0.0f;
-  x->x_old_rms = 0.0f;
-  clock_delay(x->x_clock_metro, x->x_metro_time);
-}
-
-static void sigrvu_stop(t_sigrvu *x)
-{
-  clock_unset(x->x_clock_metro);
-  x->x_started = 0;
-}
-
-static void sigrvu_start(t_sigrvu *x)
-{
-  clock_delay(x->x_clock_metro, x->x_metro_time);
-  x->x_started = 1;
-}
-
-static void sigrvu_float(t_sigrvu *x, t_floatarg f)
-{
-  if(f == 0.0)
-  {
-    clock_unset(x->x_clock_metro);
-    x->x_started = 0;
-  }
-  else
-  {
-    clock_delay(x->x_clock_metro, x->x_metro_time);
-    x->x_started = 1;
-  }
-}
-
-static void sigrvu_t_release(t_sigrvu *x, t_floatarg release_time)
-{
-  if(release_time <= 20.0f)
-    release_time = 20.0f;
-  x->x_release_time = release_time;
-  x->x_c1 = exp(-2.0*(float)x->x_metro_time/x->x_release_time);
-}
-
-static void sigrvu_t_metro(t_sigrvu *x, t_floatarg metro_time)
-{
-  if(metro_time <= 20.0f)
-    metro_time = 20.0f;
-  x->x_metro_time = (int)metro_time;
-  x->x_c1 = exp(-2.0*(float)x->x_metro_time/x->x_release_time);
-  x->x_rcp = 1.0f/(x->x_sr*(float)x->x_metro_time);
-}
-
-static t_int *sigrvu_perform(t_int *w)
-{
-  float *in = (float *)(w[1]);
-  t_sigrvu *x = (t_sigrvu *)(w[2]);
-  int n = (int)(w[3]);
-  float pow, sum=x->x_sum_rms;
-  int i;
-  
-  if(x->x_started)
-  {
-    for(i=0; i<n; i++)
-    {
-      sum += in[i]*in[i];
-    }
-    x->x_sum_rms = sum;
-  }
-  return(w+4);
-}
-
-static void sigrvu_dsp(t_sigrvu *x, t_signal **sp)
-{
-  x->x_sr = 0.001*(float)sp[0]->s_sr;
-  x->x_rcp = 1.0f/(x->x_sr*(float)x->x_metro_time);
-  dsp_add(sigrvu_perform, 3, sp[0]->s_vec, x, sp[0]->s_n);
-  clock_delay(x->x_clock_metro, x->x_metro_time);
-}
-
-static void sigrvu_tick_metro(t_sigrvu *x)
-{
-  float dbr, cur_rms, c1=x->x_c1;
-  
-  cur_rms = (1.0f - c1)*x->x_sum_rms*x->x_rcp + c1*x->x_old_rms;
-  /* NAN protect */
-  if(IEM_DENORMAL(cur_rms))
-    cur_rms = 0.0f;
-  
-  if(cur_rms <= 0.0000000001f)
-    dbr = -99.9f;
-  else if(cur_rms > 1000000.0f)
-  {
-    dbr = 60.0f;
-    x->x_old_rms = 1000000.0f;
-  }
-  else
-    dbr = 4.3429448195f*log(cur_rms);
-  x->x_sum_rms = 0.0f;
-  x->x_old_rms = cur_rms;
-  outlet_float(x->x_obj.ob_outlet, dbr);
-  clock_delay(x->x_clock_metro, x->x_metro_time);
-}
-
-static void sigrvu_ff(t_sigrvu *x)
-{
-  clock_free(x->x_clock_metro);
-}
-
-static void *sigrvu_new(t_floatarg metro_time, t_floatarg release_time)
-{
-  t_sigrvu *x=(t_sigrvu *)pd_new(sigrvu_class);
-  float t;
-  int i;
-  
-  if(metro_time <= 0.0f)
-    metro_time = 300.0f;
-  if(metro_time <= 20.0f)
-    metro_time = 20.0f;
-  if(release_time <= 0.0f)
-    release_time = 300.0f;
-  if(release_time <= 20.0f)
-    release_time = 20.0f;
-  x->x_metro_time = (int)metro_time;
-  x->x_release_time = release_time;
-  x->x_c1 = exp(-2.0*(float)x->x_metro_time/x->x_release_time);
-  x->x_sum_rms = 0.0f;
-  x->x_old_rms = 0.0f;
-  x->x_sr = 44.1f;
-  x->x_rcp = 1.0f/(x->x_sr*(float)x->x_metro_time);
-  x->x_clock_metro = clock_new(x, (t_method)sigrvu_tick_metro);
-  x->x_started = 1;
-  outlet_new(&x->x_obj, &s_float);
-  x->x_msi = 0.0f;
-  return(x);
-}
-
-void sigrvu_setup(void)
-{
-  sigrvu_class = class_new(gensym("rvu~"), (t_newmethod)sigrvu_new,
-    (t_method)sigrvu_ff, sizeof(t_sigrvu), 0,
-    A_DEFFLOAT, A_DEFFLOAT, 0);
-  CLASS_MAINSIGNALIN(sigrvu_class, t_sigrvu, x_msi);
-  class_addmethod(sigrvu_class, (t_method)sigrvu_dsp, gensym("dsp"), 0);
-  class_addfloat(sigrvu_class, sigrvu_float);
-  class_addmethod(sigrvu_class, (t_method)sigrvu_reset, gensym("reset"), 0);
-  class_addmethod(sigrvu_class, (t_method)sigrvu_start, gensym("start"), 0);
-  class_addmethod(sigrvu_class, (t_method)sigrvu_stop, gensym("stop"), 0);
-  class_addmethod(sigrvu_class, (t_method)sigrvu_t_release, gensym("t_release"), A_FLOAT, 0);
-  class_addmethod(sigrvu_class, (t_method)sigrvu_t_metro, gensym("t_metro"), A_FLOAT, 0);
-  class_sethelpsymbol(sigrvu_class, gensym("iemhelp/help-rvu~"));
-}
diff --git a/src/iemlib1/sigsin_phase.c b/src/iemlib1/sigsin_phase.c
deleted file mode 100644
index 3f8e66e..0000000
--- a/src/iemlib1/sigsin_phase.c
+++ /dev/null
@@ -1,129 +0,0 @@
-/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
-* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
-
-iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
-
-#ifdef _MSC_VER
-#pragma warning( disable : 4244 )
-#pragma warning( disable : 4305 )
-#endif
-
-
-#include "m_pd.h"
-#include "iemlib.h"
-#include <math.h>
-#include <stdio.h>
-#include <string.h>
-
-
-/* --- sin_phase~ - output the phase-difference between 2 sinewaves in samples (sig) ---- */
-
-typedef struct sigsin_phase
-{
-  t_object x_obj;
-  float    x_prev1;
-  float    x_prev2;
-  float    x_cur_out;
-  int      x_counter1;
-  int      x_counter2;
-  int      x_state1;
-  int      x_state2;
-  float    x_msi;
-} t_sigsin_phase;
-
-t_class *sigsin_phase_class;
-
-static t_int *sigsin_phase_perform(t_int *w)
-{
-  float *in1 = (float *)(w[1]);
-  float *in2 = (float *)(w[2]);
-  float *out = (float *)(w[3]);
-  t_sigsin_phase *x = (t_sigsin_phase *)(w[4]);
-  int i, n = (t_int)(w[5]);
-  float prev1=x->x_prev1;
-  float prev2=x->x_prev2;
-  float cur_out=x->x_cur_out;
-  int counter1=x->x_counter1;
-  int counter2=x->x_counter2;
-  int state1=x->x_state1;
-  int state2=x->x_state2;
-  
-  for(i=0; i<n; i++)
-  {
-    if((in1[i] >= 0.0f) && (prev1 < 0.0f))
-    {
-      state1 = 1;
-      counter1 = 0;
-    }
-    else if((in1[i] < 0.0f) && (prev1 >= 0.0f))
-    {
-      state2 = 1;
-      counter2 = 0;
-    }
-    
-    if((in2[i] >= 0.0f) && (prev2 < 0.0f))
-    {
-      state1 = 0;
-      cur_out = (float)(counter1);
-      counter1 = 0;
-    }
-    else if((in2[i] < 0.0f) && (prev2 >= 0.0f))
-    {
-      state2 = 0;
-      cur_out = (float)(counter2);
-      counter2 = 0;
-    }
-    
-    if(state1)
-      counter1++;
-    if(state2)
-      counter2++;
-    
-    prev1 = in1[i];
-    prev2 = in2[i];
-    out[i] = cur_out;
-  }
-  
-  x->x_prev1 = prev1;
-  x->x_prev2 = prev2;
-  x->x_cur_out = cur_out;
-  x->x_counter1 = counter1;
-  x->x_counter2 = counter2;
-  x->x_state1 = state1;
-  x->x_state2 = state2;
-  
-  return(w+6);
-}
-
-static void sigsin_phase_dsp(t_sigsin_phase *x, t_signal **sp)
-{
-  dsp_add(sigsin_phase_perform, 5, sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, x, sp[0]->s_n);
-}
-
-static void *sigsin_phase_new(void)
-{
-  t_sigsin_phase *x = (t_sigsin_phase *)pd_new(sigsin_phase_class);
-  
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
-  outlet_new(&x->x_obj, &s_signal);
-  
-  x->x_prev1 = 0.0f;
-  x->x_prev2 = 0.0f;
-  x->x_cur_out = 0.0f;
-  x->x_counter1 = 0;
-  x->x_counter2 = 0;
-  x->x_state1 = 0;
-  x->x_state2 = 0;
-  x->x_msi = 0;
-  
-  return (x);
-}
-
-void sigsin_phase_setup(void)
-{
-  sigsin_phase_class = class_new(gensym("sin_phase~"), (t_newmethod)sigsin_phase_new,
-        0, sizeof(t_sigsin_phase), 0, 0);
-  CLASS_MAINSIGNALIN(sigsin_phase_class, t_sigsin_phase, x_msi);
-  class_addmethod(sigsin_phase_class, (t_method)sigsin_phase_dsp, gensym("dsp"), 0);
-  class_sethelpsymbol(sigsin_phase_class, gensym("iemhelp/help-sin_phase~"));
-}
diff --git a/src/iemlib1/sigvcf_filter.c b/src/iemlib1/sigvcf_filter.c
deleted file mode 100644
index 4283e9a..0000000
--- a/src/iemlib1/sigvcf_filter.c
+++ /dev/null
@@ -1,334 +0,0 @@
-/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
-* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
-
-iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
-
-#ifdef _MSC_VER
-#pragma warning( disable : 4244 )
-#pragma warning( disable : 4305 )
-#endif
-
-
-#include "m_pd.h"
-#include "iemlib.h"
-#include <math.h>
-#include <stdio.h>
-#include <string.h>
-
-/* ---------- vcf_filter~ - slow dynamic vcf_filter 1. and 2. order ----------- */
-
-typedef struct sigvcf_filter
-{
-  t_object x_obj;
-  float x_wn1;
-  float x_wn2;
-  float x_msi;
-  char  x_filtname[6];
-} t_sigvcf_filter;
-
-t_class *sigvcf_filter_class;
-
-static t_int *sigvcf_filter_perform_snafu(t_int *w)
-{
-  float *in = (float *)(w[1]);
-  float *out = (float *)(w[4]);
-  int n = (t_int)(w[6]);
-  
-  while(n--)
-    *out++ = *in++;
-  return(w+7);
-}
-
-/*
-lp2
-wn0 = *in++ - rcp*(2.0f*(2.0f - l2)*wn1 + (l2 - al)*wn2);
-*out++ = rcp*(wn0 + 2.0f*wn1 + wn2);
-wn2 = wn1;
-wn1 = wn0;
-
-  bp2
-  wn0 = *in++ - rcp*(2.0f*(2.0f - l2)*wn1 + (l2 - al)*wn2);
-    *out++ = rcp*al*(wn0 - wn2);
-    wn2 = wn1;
-    wn1 = wn0;
-    
-      rbp2
-      wn0 = *in++ - rcp*(2.0f*(2.0f - l2)*wn1 + (l2 - al)*wn2);
-      *out++ = rcp*l*(wn0 - wn2);
-      wn2 = wn1;
-      wn1 = wn0;
-      
-        hp2
-        wn0 = *in++ - rcp*(2.0f*(2.0f - l2)*wn1 + (l2 - al)*wn2);
-        *out++ = rcp*(wn0 - 2.0f*wn1 + wn2);
-        wn2 = wn1;
-        wn1 = wn0;
-        
-*/
-
-static t_int *sigvcf_filter_perform_lp2(t_int *w)
-{
-  float *in = (float *)(w[1]);
-  float *lp = (float *)(w[2]);
-  float *q = (float *)(w[3]);
-  float *out = (float *)(w[4]);
-  t_sigvcf_filter *x = (t_sigvcf_filter *)(w[5]);
-  int i, n = (t_int)(w[6]);
-  float wn0, wn1=x->x_wn1, wn2=x->x_wn2;
-  float l, al, l2, rcp;
-  
-  for(i=0; i<n; i+=4)
-  {
-    l = lp[i];
-    if(q[i] < 0.000001)
-      al = 1000000.0*l;
-    else if(q[i] > 1000000.0)
-      al = 0.000001*l;
-    else
-      al = l/q[i];
-    l2 = l*l + 1.0f;
-    rcp = 1.0f/(al + l2);
-    
-    wn0 = *in++ - rcp*(2.0f*(2.0f - l2)*wn1 + (l2 - al)*wn2);
-    *out++ = rcp*(wn0 + 2.0f*wn1 + wn2);
-    wn2 = wn1;
-    wn1 = wn0;
-    
-    wn0 = *in++ - rcp*(2.0f*(2.0f - l2)*wn1 + (l2 - al)*wn2);
-    *out++ = rcp*(wn0 + 2.0f*wn1 + wn2);
-    wn2 = wn1;
-    wn1 = wn0;
-    
-    wn0 = *in++ - rcp*(2.0f*(2.0f - l2)*wn1 + (l2 - al)*wn2);
-    *out++ = rcp*(wn0 + 2.0f*wn1 + wn2);
-    wn2 = wn1;
-    wn1 = wn0;
-    
-    wn0 = *in++ - rcp*(2.0f*(2.0f - l2)*wn1 + (l2 - al)*wn2);
-    *out++ = rcp*(wn0 + 2.0f*wn1 + wn2);
-    wn2 = wn1;
-    wn1 = wn0;
-  }
-  /* NAN protect */
-  if(IEM_DENORMAL(wn2))
-    wn2 = 0.0f;
-  if(IEM_DENORMAL(wn1))
-    wn1 = 0.0f;
-  
-  x->x_wn1 = wn1;
-  x->x_wn2 = wn2;
-  return(w+7);
-}
-
-static t_int *sigvcf_filter_perform_bp2(t_int *w)
-{
-  float *in = (float *)(w[1]);
-  float *lp = (float *)(w[2]);
-  float *q = (float *)(w[3]);
-  float *out = (float *)(w[4]);
-  t_sigvcf_filter *x = (t_sigvcf_filter *)(w[5]);
-  int i, n = (t_int)(w[6]);
-  float wn0, wn1=x->x_wn1, wn2=x->x_wn2;
-  float l, al, l2, rcp;
-  
-  for(i=0; i<n; i+=4)
-  {
-    l = lp[i];
-    if(q[i] < 0.000001)
-      al = 1000000.0*l;
-    else if(q[i] > 1000000.0)
-      al = 0.000001*l;
-    else
-      al = l/q[i];
-    l2 = l*l + 1.0f;
-    rcp = 1.0f/(al + l2);
-    
-    
-    wn0 = *in++ - rcp*(2.0f*(2.0f - l2)*wn1 + (l2 - al)*wn2);
-    *out++ = rcp*al*(wn0 - wn2);
-    wn2 = wn1;
-    wn1 = wn0;
-    
-    wn0 = *in++ - rcp*(2.0f*(2.0f - l2)*wn1 + (l2 - al)*wn2);
-    *out++ = rcp*al*(wn0 - wn2);
-    wn2 = wn1;
-    wn1 = wn0;
-    
-    wn0 = *in++ - rcp*(2.0f*(2.0f - l2)*wn1 + (l2 - al)*wn2);
-    *out++ = rcp*al*(wn0 - wn2);
-    wn2 = wn1;
-    wn1 = wn0;
-    
-    wn0 = *in++ - rcp*(2.0f*(2.0f - l2)*wn1 + (l2 - al)*wn2);
-    *out++ = rcp*al*(wn0 - wn2);
-    wn2 = wn1;
-    wn1 = wn0;
-  }
-  /* NAN protect */
-  if(IEM_DENORMAL(wn2))
-    wn2 = 0.0f;
-  if(IEM_DENORMAL(wn1))
-    wn1 = 0.0f;
-  
-  x->x_wn1 = wn1;
-  x->x_wn2 = wn2;
-  return(w+7);
-}
-
-static t_int *sigvcf_filter_perform_rbp2(t_int *w)
-{
-  float *in = (float *)(w[1]);
-  float *lp = (float *)(w[2]);
-  float *q = (float *)(w[3]);
-  float *out = (float *)(w[4]);
-  t_sigvcf_filter *x = (t_sigvcf_filter *)(w[5]);
-  int i, n = (t_int)(w[6]);
-  float wn0, wn1=x->x_wn1, wn2=x->x_wn2;
-  float al, l, l2, rcp;
-  
-  for(i=0; i<n; i+=4)
-  {
-    l = lp[i];
-    if(q[i] < 0.000001)
-      al = 1000000.0*l;
-    else if(q[i] > 1000000.0)
-      al = 0.000001*l;
-    else
-      al = l/q[i];
-    l2 = l*l + 1.0f;
-    rcp = 1.0f/(al + l2);
-    
-    
-    wn0 = *in++ - rcp*(2.0f*(2.0f - l2)*wn1 + (l2 - al)*wn2);
-    *out++ = rcp*l*(wn0 - wn2);
-    wn2 = wn1;
-    wn1 = wn0;
-    
-    wn0 = *in++ - rcp*(2.0f*(2.0f - l2)*wn1 + (l2 - al)*wn2);
-    *out++ = rcp*l*(wn0 - wn2);
-    wn2 = wn1;
-    wn1 = wn0;
-    
-    wn0 = *in++ - rcp*(2.0f*(2.0f - l2)*wn1 + (l2 - al)*wn2);
-    *out++ = rcp*l*(wn0 - wn2);
-    wn2 = wn1;
-    wn1 = wn0;
-    
-    wn0 = *in++ - rcp*(2.0f*(2.0f - l2)*wn1 + (l2 - al)*wn2);
-    *out++ = rcp*l*(wn0 - wn2);
-    wn2 = wn1;
-    wn1 = wn0;
-  }
-  /* NAN protect */
-  if(IEM_DENORMAL(wn2))
-    wn2 = 0.0f;
-  if(IEM_DENORMAL(wn1))
-    wn1 = 0.0f;
-  
-  x->x_wn1 = wn1;
-  x->x_wn2 = wn2;
-  return(w+7);
-}
-
-static t_int *sigvcf_filter_perform_hp2(t_int *w)
-{
-  float *in = (float *)(w[1]);
-  float *lp = (float *)(w[2]);
-  float *q = (float *)(w[3]);
-  float *out = (float *)(w[4]);
-  t_sigvcf_filter *x = (t_sigvcf_filter *)(w[5]);
-  int i, n = (t_int)(w[6]);
-  float wn0, wn1=x->x_wn1, wn2=x->x_wn2;
-  float l, al, l2, rcp, forw;
-  
-  for(i=0; i<n; i+=4)
-  {
-    l = lp[i];
-    if(q[i] < 0.000001)
-      al = 1000000.0*l;
-    else if(q[i] > 1000000.0)
-      al = 0.000001*l;
-    else
-      al = l/q[i];
-    l2 = l*l + 1.0f;
-    rcp = 1.0f/(al + l2);
-    forw = rcp * (l2 - 1.0f);
-    
-    wn0 = *in++ - rcp*(2.0f*(2.0f - l2)*wn1 + (l2 - al)*wn2);
-    *out++ = forw*(wn0 - 2.0f*wn1 + wn2);
-    wn2 = wn1;
-    wn1 = wn0;
-    
-    wn0 = *in++ - rcp*(2.0f*(2.0f - l2)*wn1 + (l2 - al)*wn2);
-    *out++ = forw*(wn0 - 2.0f*wn1 + wn2);
-    wn2 = wn1;
-    wn1 = wn0;
-    
-    wn0 = *in++ - rcp*(2.0f*(2.0f - l2)*wn1 + (l2 - al)*wn2);
-    *out++ = forw*(wn0 - 2.0f*wn1 + wn2);
-    wn2 = wn1;
-    wn1 = wn0;
-    
-    wn0 = *in++ - rcp*(2.0f*(2.0f - l2)*wn1 + (l2 - al)*wn2);
-    *out++ = forw*(wn0 - 2.0f*wn1 + wn2);
-    wn2 = wn1;
-    wn1 = wn0;
-  }
-  /* NAN protect */
-  if(IEM_DENORMAL(wn2))
-    wn2 = 0.0f;
-  if(IEM_DENORMAL(wn1))
-    wn1 = 0.0f;
-  
-  x->x_wn1 = wn1;
-  x->x_wn2 = wn2;
-  return(w+7);
-}
-
-static void sigvcf_filter_dsp(t_sigvcf_filter *x, t_signal **sp)
-{
-  if(!strcmp(x->x_filtname,"bp2"))
-    dsp_add(sigvcf_filter_perform_bp2, 6, sp[0]->s_vec, sp[1]->s_vec, 
-    sp[2]->s_vec, sp[3]->s_vec, x, sp[0]->s_n);
-  else if(!strcmp(x->x_filtname,"rbp2"))
-    dsp_add(sigvcf_filter_perform_rbp2, 6, sp[0]->s_vec, sp[1]->s_vec, 
-    sp[2]->s_vec, sp[3]->s_vec, x, sp[0]->s_n);
-  else if(!strcmp(x->x_filtname,"lp2"))
-    dsp_add(sigvcf_filter_perform_lp2, 6, sp[0]->s_vec, sp[1]->s_vec,
-    sp[2]->s_vec, sp[3]->s_vec, x, sp[0]->s_n);
-  else if(!strcmp(x->x_filtname,"hp2"))
-    dsp_add(sigvcf_filter_perform_hp2, 6, sp[0]->s_vec, sp[1]->s_vec,
-    sp[2]->s_vec, sp[3]->s_vec, x, sp[0]->s_n);
-  else
-  {
-    dsp_add(sigvcf_filter_perform_snafu, 6, sp[0]->s_vec, sp[1]->s_vec,
-      sp[2]->s_vec, sp[3]->s_vec, x, sp[0]->s_n);
-    post("vcf_filter~-Error: 1. initial-arguments: <sym> kind: lp2, bp2, rbp2, hp2!");
-  }
-}
-
-static void *sigvcf_filter_new(t_symbol *filt_typ)
-{
-  t_sigvcf_filter *x = (t_sigvcf_filter *)pd_new(sigvcf_filter_class);
-  char *c;
-  
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
-  inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
-  outlet_new(&x->x_obj, &s_signal);
-  x->x_msi = 0;
-  x->x_wn1 = 0.0;
-  x->x_wn2 = 0.0;
-  c = (char *)filt_typ->s_name;
-  c[5] = 0;
-  strcpy(x->x_filtname, c);
-  return(x);
-}
-
-void sigvcf_filter_setup(void)
-{
-  sigvcf_filter_class = class_new(gensym("vcf_filter~"), (t_newmethod)sigvcf_filter_new,
-    0, sizeof(t_sigvcf_filter), 0, A_DEFSYM, 0);
-  CLASS_MAINSIGNALIN(sigvcf_filter_class, t_sigvcf_filter, x_msi);
-  class_addmethod(sigvcf_filter_class, (t_method)sigvcf_filter_dsp, gensym("dsp"), 0);
-  class_sethelpsymbol(sigvcf_filter_class, gensym("iemhelp/help-vcf_filter~"));
-}