add sigmund~

svn path=/trunk/; revision=5917

3 files changed, 1509 insertions, 0 deletions

diff --git a/pd/extra/sigmund~/makefile b/pd/extra/sigmund~/makefile
new file mode 100644
index 00000000..3dc176b3
--- /dev/null
+++ b/pd/extra/sigmund~/makefile
@@ -0,0 +1,4 @@
+NAME=sigmund~
+CSYM=sigmund_tilde
+
+include ../makefile
diff --git a/pd/extra/sigmund~/sigmund~-help.pd b/pd/extra/sigmund~/sigmund~-help.pd
new file mode 100644
index 00000000..f3556c9c
--- /dev/null
+++ b/pd/extra/sigmund~/sigmund~-help.pd
@@ -0,0 +1,172 @@
+#N canvas 209 199 580 617 12;
+#X text 42 4 sigmund~ - sinusoidal analysis and pitch tracking;
+#N canvas 432 117 573 597 using-with-tables 0;
+#X obj 29 368 print peak;
+#N canvas 0 0 450 300 (subpatch) 0;
+#X array insignal 1024 float 2;
+#X coords 0 1 1023 -1 200 140 1;
+#X restore 83 426 graph;
+#X obj 314 513 phasor~;
+#X obj 294 429 loadbang;
+#X obj 314 461 440;
+#X floatatom 313 488 5 0 0 0 - - -;
+#X obj 305 544 tabwrite~ insignal;
+#X obj 290 516 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144
+-1 -1;
+#X text 114 11 Using sigmund~ on arrays;
+#X text 42 33 If invoked with the "-t" flag (as a creation argument)
+\, sigmund~ analyzes waveforms stored in arrays. Instead of an incoming
+signal \, feed it "list" messages with the following arguments:;
+#X text 37 118 table name (a symbol);
+#X text 38 137 number of points;
+#X obj 29 342 sigmund~ -t -npeak 10 -maxfreq 5000 peaks;
+#X msg 29 316 list insignal 1024 0 44100 0;
+#X text 37 158 index of first point;
+#X text 39 179 sample rate;
+#X text 38 200 debug flag (print debugging info if nonzero);
+#X text 23 232 In this mode \, only the "env" \, "pitch" \, and "peaks"
+outputs are meaningful.;
+#X text 31 294 click here to test:;
+#X connect 2 0 6 0;
+#X connect 3 0 4 0;
+#X connect 4 0 5 0;
+#X connect 5 0 2 0;
+#X connect 5 0 7 0;
+#X connect 7 0 6 0;
+#X connect 12 0 0 0;
+#X connect 13 0 12 0;
+#X restore 330 553 pd using-with-tables;
+#X obj 40 512 phasor~;
+#X obj 40 425 loadbang;
+#X floatatom 40 471 5 0 120 0 - - -;
+#X floatatom 39 561 5 0 0 0 - - -;
+#X floatatom 245 563 5 0 0 0 - - -;
+#X obj 40 490 mtof;
+#X obj 40 448 69;
+#X text 38 579 pitch;
+#X text 222 582 envelope;
+#X text 13 28 Sigmund~ analyzes an incoming sound into sinusoidal components
+\, which may be reported individually or combined to form a pitch estimate.
+Possible outputs are specified as creation arguments:;
+#X text 55 129 env - output pitches at the beginning of notes;
+#X text 56 95 pitch - output pitch continuously;
+#N canvas 518 74 588 728 setting-parameters 0;
+#X msg 182 66 print;
+#X floatatom 192 92 5 0 0 0 - - -;
+#X msg 192 113 minpower \$1;
+#X obj 182 139 sigmund~ -minpower 40;
+#X text 39 14 You can set parameters either by creation arguments \,
+or else using messages. The "print" message gives you the current values
+of all the parameters:;
+#X text 28 169 npts: number of points used in an analysis. Must be
+a power of two \, at least 128 The minimum frequency that can be tracked
+is about 2(sample_rate)/npts.;
+#X text 26 219 hop: number of points between analyses. Must be a power
+of two \, at least the DSP vector size (usually 64). This regulates
+the number of analyses done per unit of time.;
+#X text 28 271 npeak: maximum number of sinusoidal peaks to look for.
+The computation time is quadratic in the number of peaks actually found
+(this number only sets an upper limit). Use it to balance CPU time
+with quality of results.;
+#X text 30 336 maxfreq: maximum frequency of sinusoidal peaks to look
+for. This can be useful in situations where background noise creates
+high-frequency \, spurious peaks..;
+#X text 37 388 vibrato: maximum deviation from "pitch" to accept as
+normal vibrato (affects "notes" output only). If the value is too small.
+vibratos will appear as trills. If too large \, very small melodic
+intervals may not be reported as new notes.;
+#X text 33 457 stabletime: time period to wait before reporting a note
+(affects "notes" output only). The "pitch" must be present and must
+not vary more than "vibrato" for this entire period to report a note.
+If too large \, the "notes" will be unnecessarily delayed. If too small
+\, spurious notes get output.;
+#X text 31 551 minpower: minimum measured RMS level to report a pitch
+(affects "pitch" and "notes" output only). Signals quieter than this
+will be assumed to be crosstalk and ignored.;
+#X text 32 602 growth: minimum measured RMS growth to report a new
+note (affects "notes" output only). The RMS level must rise by this
+many dB (within a time period given by "stabletime") to report a repetition
+of a note at or near the previously output pitch.;
+#X connect 0 0 3 0;
+#X connect 1 0 2 0;
+#X connect 2 0 3 0;
+#X restore 330 531 pd setting-parameters;
+#N canvas 190 230 640 535 sinusoid-tracking 0;
+#X obj 124 267 sigmund~ -npeak 10 peaks;
+#X obj 124 214 phasor~;
+#X obj 124 144 loadbang;
+#X floatatom 124 190 5 0 120 0 - - -;
+#X obj 124 295 route 0 1 2 3 4 5 6 7 8 9;
+#X obj 82 339 unpack 0 0 0 0;
+#X floatatom 82 461 5 0 0 0 - - -;
+#X floatatom 122 431 5 0 0 0 - - -;
+#X floatatom 162 406 5 0 0 0 - - -;
+#X obj 124 167 440;
+#X floatatom 203 380 5 0 0 0 - - -;
+#X obj 322 349 unpack 0 0 0 0;
+#X floatatom 322 471 5 0 0 0 - - -;
+#X floatatom 362 441 5 0 0 0 - - -;
+#X floatatom 402 416 5 0 0 0 - - -;
+#X floatatom 443 390 5 0 0 0 - - -;
+#X text 385 475 frequency (Hz.);
+#X text 419 442 peak amplitude (linear);
+#X text 464 416 cosine component;
+#X text 499 390 sine component;
+#X text 42 26 You can ask for sinusoidal peaks in decreasing order
+of amplitude or arranged into maximally continuous tracks for resynthesis.
+(Or you can ask for both.) In any case \, out come lists of five numbers
+\, one for each sinusoid at each analysis period. The first is the
+number of the sinusoid (so you can use "route" to claw them apart).
+The other four are as shown:;
+#X text 79 505 loudest partial;
+#X text 332 508 quietest partial;
+#X connect 0 0 4 0;
+#X connect 1 0 0 0;
+#X connect 2 0 9 0;
+#X connect 3 0 1 0;
+#X connect 4 0 5 0;
+#X connect 4 9 11 0;
+#X connect 5 0 6 0;
+#X connect 5 1 7 0;
+#X connect 5 2 8 0;
+#X connect 5 3 10 0;
+#X connect 9 0 3 0;
+#X connect 11 0 12 0;
+#X connect 11 1 13 0;
+#X connect 11 2 14 0;
+#X connect 11 3 15 0;
+#X restore 330 508 pd sinusoid-tracking;
+#X text 52 165 tracks - output sinusoidal peaks organized into tracks
+;
+#X text 56 111 notes - output pitch at the beginning of notes;
+#X text 339 485 more details:;
+#X text 10 184 Parameters you may set (in creation arguments or messages):
+;
+#X text 60 207 npts - number of points in each analysis window (1024)
+;
+#X text 60 225 hop - number of points between each analysis (512);
+#X text 60 242 npeak - number of sinusoidal peaks (20);
+#X text 61 279 vibrato - depth of vibrato to expect in 1/2-tones (1)
+;
+#X text 60 298 stabletime - time (msec) to wait to report notes (50)
+;
+#X obj 39 535 sigmund~ -hop 4096 pitch env;
+#X text 62 316 minpower - minimum power (dB) to report a pitch (50)
+;
+#X text 62 335 growth - growth (dB) to report a new note (7);
+#X text 54 147 peaks - output all sinusoidal peaks in order of amplitude
+;
+#X text 380 596 updated for Pd v0.40;
+#X text 11 356 The npts and hop parameters are in samples \, and are
+powers of two. The example below specifies a huge hop of 4096 (to slow
+the output down) and to output "pitch" and "env". (Those are the default
+outputs.);
+#X text 61 260 maxfreq - maximum sinusoid frequency in Hz. (1000000)
+;
+#X connect 2 0 25 0;
+#X connect 3 0 8 0;
+#X connect 4 0 7 0;
+#X connect 7 0 2 0;
+#X connect 8 0 4 0;
+#X connect 25 0 5 0;
+#X connect 25 1 6 0;
diff --git a/pd/extra/sigmund~/sigmund~.c b/pd/extra/sigmund~/sigmund~.c
new file mode 100644
index 00000000..96d15a2c
--- /dev/null
+++ b/pd/extra/sigmund~/sigmund~.c
@@ -0,0 +1,1333 @@
+/* Copyright (c) 2005 Miller Puckette.  BSD licensed.  No warranties. */
+
+/*
+    fix parameter settings
+    not to report pitch if evidence too scanty?
+    note-on detection triggered by falling envelope (a posteriori)
+    reentrancy bug setting loud flag (other parameters too?)
+    tweaked freqs still not stable enough
+    implement block ("-b") mode
+*/
+
+#include "m_pd.h"
+#include <math.h>
+#include <stdio.h>
+#include <string.h>
+#ifdef MSW
+#include <malloc.h>
+#else
+#include <alloca.h>
+#endif
+#include <stdlib.h>
+#ifdef NT
+#pragma warning( disable : 4244 )
+#pragma warning( disable : 4305 )
+#endif
+
+typedef struct peak
+{
+    float p_freq;
+    float p_amp;
+    float p_ampreal;
+    float p_ampimag;
+    float p_pit;
+    float p_db;
+    float p_salience;
+    float p_tmp;
+} t_peak;
+
+/********************** service routines **************************/
+
+static int sigmund_ilog2(int n)
+{
+    int ret = -1;
+    while (n)
+    {
+        n >>= 1;
+        ret++;
+    }
+    return (ret);
+}
+
+/* parameters for von Hann window (change these to get Hamming if desired) */
+#define W_ALPHA 0.5
+#define W_BETA 0.5
+#define NEGBINS 4   /* number of bins of negative frequency we'll need */
+
+#define PI 3.14159265
+#define LOG2  0.69314718
+#define LOG10 2.30258509
+
+static float sinx(float theta, float sintheta)
+{
+    if (theta > -0.003 && theta < 0.003)
+        return (1);
+    else return (sintheta/theta);
+}
+
+static float window_hann_mag(float pidetune, float sinpidetune)
+{
+    return (W_ALPHA * sinx(pidetune, sinpidetune)
+        - 0.5 * W_BETA *
+            (sinx(pidetune+PI, sinpidetune) + sinx(pidetune-PI, sinpidetune)));
+}
+
+static float window_mag(float pidetune, float cospidetune)
+{
+    return (sinx(pidetune + (PI/2), cospidetune)
+        + sinx(pidetune - (PI/2), -cospidetune));
+}
+
+/*********** Routines to analyze a window into sinusoidal peaks *************/
+
+static int sigmund_cmp_freq(const void *p1, const void *p2)
+{
+    if ((*(t_peak **)p1)->p_freq > (*(t_peak **)p2)->p_freq)
+        return (1);
+    else if ((*(t_peak **)p1)->p_freq < (*(t_peak **)p2)->p_freq)
+        return (-1);
+    else return (0);
+}
+
+static void sigmund_tweak(int npts, float *ftreal, float *ftimag,
+    int npeak, t_peak *peaks, float fperbin, int loud)
+{
+    t_peak **peakptrs = (t_peak **)alloca(sizeof (*peakptrs) * (npeak+1));
+    t_peak negpeak;
+    int peaki, j, k;
+    float ampreal[3], ampimag[3];
+    float binperf = 1./fperbin;
+    float phaseperbin = (npts-0.5)/npts, oneovern = 1./npts;
+    if (npeak < 1)
+        return;
+    for (peaki = 0; peaki < npeak; peaki++)
+        peakptrs[peaki+1] = &peaks[peaki];
+    qsort(peakptrs+1, npeak, sizeof (*peakptrs), sigmund_cmp_freq);
+    peakptrs[0] = &negpeak;
+    negpeak.p_ampreal = peakptrs[1]->p_ampreal;
+    negpeak.p_ampimag = -peakptrs[1]->p_ampimag;
+    negpeak.p_freq = -peakptrs[1]->p_freq;
+    for (peaki = 1; peaki <= npeak; peaki++)
+    {
+        int cbin = peakptrs[peaki]->p_freq*binperf + 0.5;
+        int nsub = (peaki == npeak ? 1:2);
+        float windreal, windimag, windpower, detune, pidetune, sinpidetune,
+            cospidetune, ampcorrect, ampout, ampoutreal, ampoutimag, freqout;
+        /* post("3 nsub %d amp %f freq %f", nsub,
+            peakptrs[peaki]->p_amp, peakptrs[peaki]->p_freq); */
+        if (cbin < 0 || cbin > 2*npts - 3)
+            continue;
+        for (j = 0; j < 3; j++)
+            ampreal[j] = ftreal[cbin+2*j-2], ampimag[j] = ftimag[cbin+2*j-2];
+        /* post("a %f %f", ampreal[1], ampimag[1]); */
+        for (j = 0; j < nsub; j++)
+        {
+            t_peak *neighbor = peakptrs[(peaki-1) + 2*j];
+            float neighborreal = npts * neighbor->p_ampreal;
+            float neighborimag = npts * neighbor->p_ampimag;
+            for (k = 0; k < 3; k++)
+            {
+                float freqdiff = (0.5*PI) * ((cbin + 2*k-2)
+                    -binperf * neighbor->p_freq);
+                float sx = sinx(freqdiff, sin(freqdiff));
+                float phasere = cos(freqdiff * phaseperbin);
+                float phaseim = sin(freqdiff * phaseperbin);
+                ampreal[k] -=
+                    sx * (phasere * neighborreal - phaseim * neighborimag);
+                ampimag[k] -=
+                    sx * (phaseim * neighborreal + phasere * neighborimag);
+            }       
+            /* post("b %f %f", ampreal[1], ampimag[1]); */
+        }
+
+        windreal = W_ALPHA * ampreal[1] -
+            (0.5 * W_BETA) * (ampreal[0] + ampreal[2]);
+        windimag = W_ALPHA * ampimag[1] -
+            (0.5 * W_BETA) * (ampimag[0] + ampimag[2]);
+        windpower = windreal * windreal + windimag * windimag;
+        detune = (
+            W_BETA*(ampreal[0] - ampreal[2]) * 
+                (2.0*W_ALPHA * ampreal[1] - W_BETA * (ampreal[0] + ampreal[2]))
+                    +
+            W_BETA*(ampimag[0] - ampimag[2]) *
+                (2.0*W_ALPHA * ampimag[1] - W_BETA * (ampimag[0] + ampimag[2]))
+                        ) / (4.0 * windpower);
+        if (detune > 0.5)
+            detune = 0.5;
+        else if (detune < -0.5)
+            detune = -0.5;
+        /* if (loud > 0)
+            post("tweak: windpower %f, bin %d, detune %f",
+                windpower, cbin, detune); */
+        pidetune = PI * detune;
+        sinpidetune = sin(pidetune);
+        cospidetune = cos(pidetune);
+
+        ampcorrect = 1.0 / window_hann_mag(pidetune, sinpidetune);
+
+        ampout = oneovern * ampcorrect *sqrt(windpower);
+        ampoutreal = oneovern * ampcorrect *
+            (windreal * cospidetune - windimag * sinpidetune);
+        ampoutimag = oneovern * ampcorrect *
+            (windreal * sinpidetune + windimag * cospidetune);
+        freqout = (cbin + 2*detune) * fperbin;
+        if (loud > 1)
+            post("amp %f, freq %f", ampout, freqout);
+        
+        peakptrs[peaki]->p_freq = freqout;
+        peakptrs[peaki]->p_amp = ampout;
+        peakptrs[peaki]->p_ampreal = ampoutreal;
+        peakptrs[peaki]->p_ampimag = ampoutimag;
+    }
+}
+
+
+static void sigmund_getrawpeaks(int npts, float *insamps,
+    int npeak, t_peak *peakv, int *nfound, float *power, float srate, int loud,
+    float param1, float param2, float param3, float hifreq)
+{
+    float oneovern = 1.0/ (float)npts;
+    float fperbin = 0.5 * srate * oneovern;
+    int npts2 = 2*npts, i, bin;
+    int count, peakcount = 0;
+    float *fp1, *fp2;
+    float *rawpow, *rawreal, *rawimag, *maskbuf;
+    float *bigbuf = alloca(sizeof (float ) * (2*NEGBINS + 5*npts));
+    int maxbin = hifreq/fperbin;
+    int altwind = (param3 == 1);
+    int tweak = (param3 == 0);
+    if (maxbin > npts - NEGBINS)
+        maxbin = npts - NEGBINS;
+    if (loud) post("tweak %d", tweak);
+    maskbuf = bigbuf + npts2;
+    rawreal = maskbuf + npts+NEGBINS;
+    rawimag = rawreal+npts+NEGBINS;
+    for (i = 0; i < npts; i++)
+        maskbuf[i] = 0;
+
+    for (i = 0; i < npts; i++)
+        bigbuf[i] = insamps[i];
+    for (i = npts; i < 2*npts; i++)
+        bigbuf[i] = 0;
+    mayer_realfft(npts2, bigbuf);
+    for (i = 0; i < npts; i++)
+        rawreal[i] = bigbuf[i];
+    for (i = 1; i < npts-1; i++)
+        rawimag[i] = bigbuf[npts2-i];
+    if (loud && npts == 1024)
+    {
+        float bigbuf2[2048];
+        for (i = 0; i < 1024; i++)
+            bigbuf2[i] = insamps[i];
+        for (i = 1024; i < 2048; i++)
+            bigbuf2[i] = 0;
+        mayer_realfft(2048, bigbuf2);
+        for (i = 1; i < 10; i++)
+            post("(%10.2f, %10.2f) -> (%10.2f, %10.2f)",
+                bigbuf2[i], bigbuf2[2048-i], rawreal[i], rawimag[i]);
+    }
+
+    rawreal[-1] = rawreal[1];
+    rawreal[-2] = rawreal[2];
+    rawreal[-3] = rawreal[3];
+    rawreal[-4] = rawreal[4];
+    rawimag[0] = rawimag[npts-1] = 0;
+    rawimag[-1] = -rawimag[1];
+    rawimag[-2] = -rawimag[2];
+    rawimag[-3] = -rawimag[3];
+    rawimag[-4] = -rawimag[4];
+
+    for (peakcount = 0; peakcount < npeak; peakcount++)
+    {
+        float pow1, maxpower = 0, totalpower = 0, windreal, windimag, windpower,
+            detune, pidetune, sinpidetune, cospidetune, ampcorrect, ampout,
+            ampoutreal, ampoutimag, freqout, freqcount1, freqcount2, powmask;
+        int bestindex = -1;
+        for (bin = 2, fp1 = rawreal+2, fp2 = rawimag+2;
+            bin < maxbin; bin++, fp1++, fp2++)
+        {
+            float x1, x2, a1, a2, b1, b2, thresh;
+            if (altwind)
+            {
+                x1 = fp1[0] - 0.5*(fp1[-2] +fp1[2]);
+                x2 = fp2[0] - 0.5*(fp2[-2] +fp2[2]);
+                a1 = fp1[4] - 0.5*(fp1[2] +fp1[6]);
+                a2 = fp2[2] - 0.5*(fp2[2] +fp2[6]);
+                b1 = fp1[-4] - 0.5*(fp1[-2] +fp1[-6]);
+                b2 = fp2[-4] - 0.5*(fp2[-2] +fp2[-6]);
+                thresh = param2 * (a1*a1+a2*a2+b1*b1+b2*b2);
+            }
+            else
+            {
+                x1 = fp1[1] - fp1[-1];
+                x2 = fp2[1] - fp2[-1];
+                a1 = fp1[3] - fp1[1];
+                a2 = fp2[3] - fp2[1];
+                b1 = fp1[-1] - fp1[-3];
+                b2 = fp2[-1] - fp2[-3];
+                thresh = param2 * (a1*a1+a2*a2+b1*b1+b2*b2);
+            }
+            pow1 = x1*x1+x2*x2;
+            if (pow1 > maxpower && pow1 > maskbuf[bin])
+            {
+                if (pow1 > thresh)
+                    maxpower = pow1, bestindex = bin;
+            }
+            totalpower += pow1;
+        }
+        if (totalpower <= 0 || maxpower < 1e-10*totalpower || bestindex < 0)
+            break;
+        fp1 = rawreal+bestindex;
+        fp2 = rawimag+bestindex;
+        *power = 0.5 * totalpower *oneovern * oneovern;
+        powmask = maxpower * exp(-param1 * log(10.) / 10.);
+        if (loud > 2)
+            post("maxpower %f, powmask %f, param1 %f",
+                maxpower, powmask, param1);
+        for (bin = 2; bin < maxbin; bin++)
+        {
+            float bindiff = bin - bestindex;
+            float mymask =
+                powmask/ (1. + bindiff * bindiff * bindiff * bindiff);
+            if (bindiff < 2 && bindiff > -2)
+                mymask = 2*maxpower;
+            if (mymask > maskbuf[bin])
+                maskbuf[bin] = mymask;
+        } 
+        
+        if (loud > 1)
+            post("best index %d, total power %f", bestindex, totalpower);
+        if (altwind)
+        {
+            windreal = W_ALPHA * fp1[0] - (0.5 * W_BETA) * (fp1[2] + fp1[-2]);
+            windimag = W_ALPHA * fp2[0] - (0.5 * W_BETA) * (fp2[2] + fp2[-2]);
+            windpower = windreal * windreal + windimag * windimag;
+            detune = (
+                (W_BETA*(rawreal[bestindex-2] - rawreal[bestindex+2])) *
+                (2.0 * W_ALPHA * rawreal[bestindex] - 
+                    W_BETA * (rawreal[bestindex-2] + rawreal[bestindex+2]))
+                        +
+                (W_BETA*(rawimag[bestindex-2] - rawimag[bestindex+2])) *
+                (2.0 * W_ALPHA * rawimag[bestindex] - 
+                    W_BETA * (rawimag[bestindex-2] + rawimag[bestindex+2]))
+                            ) / (4.0 * windpower);
+        }
+        else
+        {
+            windreal = fp1[1] - fp1[-1];
+            windimag = fp2[1] - fp2[-1];
+            windpower = windreal * windreal + windimag * windimag;
+            detune = ((fp1[1] * fp1[1] - fp1[-1]*fp1[-1]) 
+                + (fp2[1] * fp2[1] - fp2[-1]*fp2[-1])) / (2 * windpower);
+            if (loud > 2) post("(-1) %f %f; (1) %f %f",
+                fp1[-1], fp2[-1], fp1[1], fp2[1]);
+            if (loud > 2) post("peak %f %f",
+                fp1[0], fp2[0]);
+        }
+        if (detune > 0.5)
+            detune = 0.5;
+        else if (detune < -0.5)
+            detune = -0.5;
+        if (loud > 1)
+            post("windpower %f, index %d, detune %f",
+                windpower, bestindex, detune);
+        pidetune = PI * detune;
+        sinpidetune = sin(pidetune);
+        cospidetune = cos(pidetune);
+        if (altwind)
+            ampcorrect = 1.0 / window_hann_mag(pidetune, sinpidetune);
+        else ampcorrect = 1.0 / window_mag(pidetune, cospidetune);
+
+        ampout = ampcorrect *sqrt(windpower);
+        ampoutreal = ampcorrect *
+            (windreal * cospidetune - windimag * sinpidetune);
+        ampoutimag = ampcorrect *
+            (windreal * sinpidetune + windimag * cospidetune);
+
+            /* the frequency is the sum of the bin frequency and detuning */
+
+        peakv[peakcount].p_freq = (freqout = (bestindex + 2*detune)) * fperbin;
+        peakv[peakcount].p_amp = oneovern * ampout;
+        peakv[peakcount].p_ampreal = oneovern * ampoutreal;
+        peakv[peakcount].p_ampimag = oneovern * ampoutimag;
+    }
+    if (tweak)
+    {
+        sigmund_tweak(npts, rawreal, rawimag, peakcount, peakv, fperbin, loud);
+        sigmund_tweak(npts, rawreal, rawimag, peakcount, peakv, fperbin, loud);
+    }
+    for (i = 0; i < peakcount; i++)
+    {
+        peakv[i].p_pit = ftom(peakv[i].p_freq);
+        peakv[i].p_db = powtodb(peakv[i].p_amp);
+    }
+    *nfound = peakcount;
+}
+
+/*************** Routines for finding fundamental pitch *************/
+
+#define PITCHNPEAK 12
+#define PITCHUNCERTAINTY 0.3
+#define HALFTONEINC 0.059
+#define SUBHARMONICS 16
+#define DBPERHALFTONE 0.5
+
+static void sigmund_getpitch(int npeak, t_peak *peakv, float *freqp,
+    float npts, float srate, int loud)
+{
+    float fperbin = 0.5 * srate / npts;
+    int npit = 48 * sigmund_ilog2(npts), i, j, k, nsalient;
+    float bestbin, bestweight, sumamp, sumweight, sumfreq, sumallamp, 
+        freq;
+    float *weights =  (float *)alloca(sizeof(float) * npit);
+    t_peak *bigpeaks[PITCHNPEAK];
+    int nbigpeaks;
+    if (npeak < 1)
+    {
+        freq = 0;
+        goto done;
+    }
+    for (i = 0; i < npit; i++)
+        weights[i] = 0;
+    for (i = 0; i < npeak; i++)
+    {
+        peakv[i].p_tmp = 0;
+        peakv[i].p_salience = peakv[i].p_db - DBPERHALFTONE * peakv[i].p_pit;
+    }
+    for (nsalient = 0; nsalient < PITCHNPEAK; nsalient++)
+    {
+        t_peak *bestpeak = 0;
+        float bestsalience = -1e20;
+        for (j = 0; j < npeak; j++)
+            if (peakv[j].p_tmp == 0 && peakv[j].p_salience > bestsalience)
+        {
+            bestsalience = peakv[j].p_salience;
+            bestpeak = &peakv[j];
+        }
+        if (!bestpeak)
+            break;
+        bigpeaks[nsalient] = bestpeak;
+        bestpeak->p_tmp = 1;
+        /* post("peak f=%f a=%f", bestpeak->p_freq, bestpeak->p_amp); */
+    }
+    sumweight = 0;
+    for (i = 0; i < nsalient; i++)
+    {
+        t_peak *thispeak = bigpeaks[i];
+        float pitchuncertainty =
+            4 * PITCHUNCERTAINTY * fperbin / (HALFTONEINC * thispeak->p_freq);
+        float weightindex = (48./LOG2) *
+            log(thispeak->p_freq/(2.*fperbin));
+        float loudness = sqrt(thispeak->p_amp);
+        /* post("index %f, uncertainty %f", weightindex, pitchuncertainty); */
+        for (j = 0; j < SUBHARMONICS; j++)
+        {
+            float subindex = weightindex -
+                (48./LOG2) * log(j + 1.);
+            int loindex = subindex - pitchuncertainty;
+            int hiindex = subindex + pitchuncertainty + 1;
+            if (hiindex < 0)
+                break;
+            if (hiindex >= npit)
+                continue;
+            if (loindex < 0)
+                loindex = 0;
+            for (k = loindex; k <= hiindex; k++)
+                weights[k] += loudness * 4. / (4. + j);
+        }
+        sumweight += loudness;
+    }
+#if 0
+    for (i = 0; i < npit; i++)
+    {
+        postfloat(weights[i]);
+        if (!((i+1)%12)) post("");
+    }
+#endif
+    bestbin = -1;
+    bestweight = -1e20;
+    for (i = 0; i < npit; i++)
+        if (weights[i] > bestweight)
+            bestweight = weights[i], bestbin = i;
+    if (bestweight < sumweight * 0.4)
+        bestbin = -1;
+    
+    if (bestbin < 0)
+    {
+        freq = 0;
+        goto done;
+    }
+    for (i = bestbin+1; i < npit; i++)
+    {
+        if (weights[i] < bestweight)
+            break;
+        bestbin += 0.5;
+    }
+    freq = 2*fperbin * exp((LOG2/48.)*bestbin);
+
+    for (sumamp = sumweight = sumfreq = 0, i = 0; i < nsalient; i++)
+    {
+        t_peak *thispeak = bigpeaks[i];
+        float thisloudness = sqrt(thispeak->p_amp);
+        float thisfreq = thispeak->p_freq;
+        float harmonic = thisfreq/freq;
+        float intpart = (int)(0.5 + harmonic);
+        float inharm = freq * (harmonic - intpart);
+        if (harmonic < 1)
+            continue;
+        if (inharm < 0.25*fperbin && inharm > -0.25*fperbin)
+        {
+            float weight = thisloudness * intpart;
+            sumweight += weight;
+            sumfreq += weight*thisfreq/intpart;
+        }
+    }
+    if (sumweight > 0)
+        freq = sumfreq / sumweight;
+done:
+    if (!(freq >= 0 || freq <= 0))
+    {
+        post("freq nan cancelled");
+        freq = 0;
+    }
+    *freqp = freq;
+}
+
+/*************** gather peak lists into sinusoidal tracks *************/
+
+static void sigmund_peaktrack(int ninpeak, t_peak *inpeakv, 
+    int noutpeak, t_peak *outpeakv, int loud)
+{
+    int incnt, outcnt;
+    for (outcnt = 0; outcnt < noutpeak; outcnt++)
+        outpeakv[outcnt].p_tmp = -1;
+        
+        /* first pass. Match each "in" peak with the closest previous
+        "out" peak, but no two to the same one. */
+    for (incnt = 0; incnt < ninpeak; incnt++)
+    {
+        float besterror = 1e20;
+        int bestcnt = -1;
+        inpeakv[incnt].p_tmp = -1;
+        for (outcnt = 0; outcnt < noutpeak; outcnt++)
+        {
+            float thiserror =
+                inpeakv[incnt].p_freq - outpeakv[outcnt].p_freq;
+            if (thiserror < 0)
+                thiserror = -thiserror;
+            if (thiserror < besterror)
+            {
+                besterror = thiserror;
+                bestcnt = outcnt;
+            }
+        }
+        if (outpeakv[bestcnt].p_tmp < 0)
+        {
+            outpeakv[bestcnt] = inpeakv[incnt];
+            inpeakv[incnt].p_tmp = 0;
+            outpeakv[bestcnt].p_tmp = 0;
+        }
+    }
+        /* second pass.  Unmatched "in" peaks assigned to free "out"
+        peaks */
+    for (incnt = 0; incnt < ninpeak; incnt++)
+        if (inpeakv[incnt].p_tmp < 0)
+    {
+        for (outcnt = 0; outcnt < noutpeak; outcnt++)
+            if (outpeakv[outcnt].p_tmp < 0)
+        {
+            outpeakv[outcnt] = inpeakv[incnt];
+            inpeakv[incnt].p_tmp = 0;
+            outpeakv[outcnt].p_tmp = 1;
+            break;
+        }
+    }
+    for (outcnt = 0; outcnt < noutpeak; outcnt++)
+        if (outpeakv[outcnt].p_tmp == -1)
+            outpeakv[outcnt].p_amp = 0;
+}
+
+/**************** parse continuous pitch into note starts ***************/
+
+#define NHISTPOINT 100
+
+typedef struct _histpoint
+{
+    float h_freq;
+    float h_power;
+} t_histpoint;
+
+typedef struct _notefinder
+{
+    float n_age;
+    float n_hifreq;
+    float n_lofreq;
+    int n_peaked;
+    t_histpoint n_hist[NHISTPOINT];
+    int n_histphase;
+} t_notefinder;
+
+
+static void notefinder_init(t_notefinder *x)
+{
+    int i;
+    x->n_peaked = x->n_age = 0;
+    x->n_hifreq = x->n_lofreq = 0;
+    x->n_histphase = 0;
+    for (i = 0; i < NHISTPOINT; i++)
+        x->n_hist[i].h_freq =x->n_hist[i].h_power = 0;
+}
+
+static void notefinder_doit(t_notefinder *x, float freq, float power,
+    float *note, float vibrato, int stableperiod, float powerthresh,
+        float growththresh, int loud)
+{
+        /* calculate frequency ratio between allowable vibrato extremes
+        (equal to twice the vibrato deviation from center) */
+    float vibmultiple = exp((2*LOG2/12) * vibrato);
+    int oldhistphase, i, k;
+    if (stableperiod > NHISTPOINT - 1)
+        stableperiod = NHISTPOINT - 1;
+    if (++x->n_histphase == NHISTPOINT)
+        x->n_histphase = 0;
+    x->n_hist[x->n_histphase].h_freq = freq;
+    x->n_hist[x->n_histphase].h_power = power;
+    x->n_age++;
+    *note = 0;
+    if (loud)
+    {
+        post("stable %d, age %d, vibmultiple %f, powerthresh %f, hifreq %f",
+            stableperiod, (int)x->n_age ,vibmultiple, powerthresh, x->n_hifreq);
+        post("histfreq %f %f %f %f",
+            x->n_hist[x->n_histphase].h_freq,
+            x->n_hist[(x->n_histphase+NHISTPOINT-1)%NHISTPOINT].h_freq,
+            x->n_hist[(x->n_histphase+NHISTPOINT-2)%NHISTPOINT].h_freq,
+            x->n_hist[(x->n_histphase+NHISTPOINT-3)%NHISTPOINT].h_freq);
+        post("power %f %f %f %f",
+            x->n_hist[x->n_histphase].h_power,
+            x->n_hist[(x->n_histphase+NHISTPOINT-1)%NHISTPOINT].h_power,
+            x->n_hist[(x->n_histphase+NHISTPOINT-2)%NHISTPOINT].h_power,
+            x->n_hist[(x->n_histphase+NHISTPOINT-3)%NHISTPOINT].h_power);
+        for (i = 0, k = x->n_histphase; i < stableperiod; i++)
+        {
+            post("pit %5.1f  pow %f", ftom(x->n_hist[k].h_freq),
+                x->n_hist[k].h_power);
+            if (--k < 0)
+                k = NHISTPOINT - 1;
+        }
+    }
+       /* look for shorter notes than "stableperiod" in length.
+       The amplitude must rise and then fall while the pitch holds
+       steady. */
+    if (x->n_hifreq <= 0 && x->n_age > stableperiod)
+    {
+        float maxpow = 0, freqatmaxpow = 0,
+            localhifreq = -1e20, locallofreq = 1e20;
+        int startphase = x->n_histphase - stableperiod + 1;
+        if (startphase < 0)
+            startphase += NHISTPOINT;
+        for (i = 0, k = startphase; i < stableperiod; i++)
+        {
+            if (x->n_hist[k].h_freq <= 0)
+                break;
+            if (x->n_hist[k].h_power > maxpow)
+                maxpow = x->n_hist[k].h_power,
+                    freqatmaxpow = x->n_hist[k].h_freq;
+            if (x->n_hist[k].h_freq > localhifreq)
+                localhifreq = x->n_hist[k].h_freq;
+            if (x->n_hist[k].h_freq < locallofreq)
+                locallofreq = x->n_hist[k].h_freq;
+            if (localhifreq > locallofreq * vibmultiple)
+                break;
+            if (maxpow > power * growththresh &&
+                maxpow > x->n_hist[startphase].h_power * growththresh &&
+                    localhifreq < vibmultiple * locallofreq
+                        && freqatmaxpow > 0 && maxpow > powerthresh)
+            {
+                x->n_hifreq = x->n_lofreq = *note = freqatmaxpow;
+                x->n_age = 0;
+                x->n_peaked = 0;
+                /* post("got short note"); */
+                return;
+            }
+            if (++k >= NHISTPOINT)
+                k = 0;
+        }
+        
+    }
+    if (x->n_hifreq > 0)
+    {
+            /* test if we're within "vibrato" range, and if so update range */
+        if (freq * vibmultiple >= x->n_hifreq &&
+            x->n_lofreq * vibmultiple >= freq)
+        {
+            if (freq > x->n_hifreq)
+                x->n_hifreq = freq;
+            if (freq < x->n_lofreq)
+                x->n_lofreq = freq;
+        }
+        else if (x->n_hifreq > 0 && x->n_age > stableperiod)
+        {
+                /* if we've been out of range at least 1/2 the
+                last "stableperiod" analyses, clear the note */
+            int nbad = 0;
+            for (i = 0, k = x->n_histphase; i < stableperiod - 1; i++)
+            {
+                if (--k < 0)
+                    k = NHISTPOINT - 1;
+                if (x->n_hist[k].h_freq * vibmultiple <= x->n_hifreq ||
+                    x->n_lofreq * vibmultiple <= x->n_hist[k].h_freq)
+                        nbad++;
+            }
+            if (2 * nbad >= stableperiod)
+            {
+                x->n_hifreq = x->n_lofreq = 0;
+                x->n_age = 0;
+            }
+        }
+    }
+
+    oldhistphase = x->n_histphase - stableperiod;
+    if (oldhistphase < 0)
+        oldhistphase += NHISTPOINT;
+        
+        /* look for envelope attacks */
+
+    if (x->n_hifreq > 0 && x->n_peaked)
+    {
+        if (freq > 0 && power > powerthresh &&
+            power > x->n_hist[oldhistphase].h_power *
+                exp((LOG10*0.1)*growththresh))
+        {
+                /* clear it and fall through for new stable-note test */
+            x->n_peaked = 0;
+            x->n_hifreq = x->n_lofreq = 0;
+            x->n_age = 0;
+        }
+    }
+    else if (!x->n_peaked)
+    {
+        if (x->n_hist[oldhistphase].h_power > powerthresh &&
+            x->n_hist[oldhistphase].h_power > power)
+                x->n_peaked = 1;
+    }
+
+        /* test for a new note using a stability criterion. */
+
+    if (freq >= 0 &&
+        (x->n_hifreq <= 0 || freq > x->n_hifreq || freq < x->n_lofreq))
+    {
+        float testfhi, testflo, maxpow = 0;
+        for (i = 0, k = x->n_histphase, testfhi = testflo = freq;
+            i < stableperiod-1; i++)
+        {
+            if (--k < 0)
+                k = NHISTPOINT - 1;
+            if (x->n_hist[k].h_freq > testfhi)
+                testfhi = x->n_hist[k].h_freq;
+            if (x->n_hist[k].h_freq < testflo)
+                testflo = x->n_hist[k].h_freq;
+            if (x->n_hist[k].h_power > maxpow)
+                maxpow = x->n_hist[k].h_power;
+        }
+        if (testflo > 0 && testfhi <= vibmultiple * testflo
+            && maxpow > powerthresh)
+        {
+                /* report new note */
+            float sumf = 0, sumw = 0, thisf, thisw;
+            for (i = 0, k = x->n_histphase; i < stableperiod; i++)
+            {
+                thisw = x->n_hist[k].h_power;
+                sumw += thisw;
+                sumf += thisw*x->n_hist[k].h_freq;
+                if (--k < 0)
+                    k = NHISTPOINT - 1;
+            }
+            x->n_hifreq = x->n_lofreq = *note = (sumw > 0 ? sumf/sumw : 0);
+#if 0
+                /* debugging printout */
+            for (i = 0; i < stableperiod; i++)
+            {
+                int k3 = x->n_histphase - i;
+                if (k3 < 0)
+                    k3 += NHISTPOINT;
+                startpost("%5.1f ", ftom(x->n_hist[k3].h_freq));
+            }
+            post("");
+#endif
+            x->n_age = 0;
+            x->n_peaked = 0;
+            return;
+        }
+    }
+    *note = 0;
+    return;
+}
+
+/*************************** Glue for Pd ************************/
+
+static t_class *sigmund_class;
+#define NHIST 100
+
+#define MODE_STREAM 1
+#define MODE_BLOCK 2        /* uninplemented */
+#define MODE_TABLE 3
+
+#define NPOINTS_DEF 1024
+#define NPOINTS_MIN 128
+
+#define HOP_DEF 512
+#define NPEAK_DEF 20
+
+#define VIBRATO_DEF 1
+#define STABLETIME_DEF 50
+#define MINPOWER_DEF 50
+#define GROWTH_DEF 7
+
+#define OUT_PITCH 0
+#define OUT_ENV 1
+#define OUT_NOTE 2
+#define OUT_PEAKS 3
+#define OUT_TRACKS 4
+#define OUT_SMSPITCH 5
+#define OUT_SMSNONPITCH 6
+
+typedef struct _varout
+{
+    t_outlet *v_outlet;
+    int v_what;
+} t_varout;
+
+typedef struct _sigmund
+{
+    t_object x_obj;
+    t_varout *x_varoutv;
+    int x_nvarout;
+    t_clock *x_clock;
+    float x_f;          /* for main signal inlet */
+    float x_sr;         /* sample rate */
+    int x_mode;         /* MODE_STREAM, etc. */
+    int x_npts;         /* number of points in analysis window */
+    int x_npeak;        /* number of peaks to find */
+    int x_loud;         /* debug level */
+    t_sample *x_inbuf;  /* input buffer */
+    int x_infill;       /* number of points filled */
+    int x_countdown;    /* countdown to start filling buffer */
+    int x_hop;          /* samples between analyses */ 
+    float x_maxfreq;    /* highest-frequency peak to report */ 
+    float x_vibrato;    /* vibrato depth in half tones */ 
+    float x_stabletime; /* period of stability needed for note */ 
+    float x_growth;     /* growth to set off a new note */ 
+    float x_minpower;   /* minimum power, in DB, for a note */ 
+    float x_param1;
+    float x_param2;
+    float x_param3;
+    t_notefinder x_notefinder;
+    t_peak *x_trackv;
+    int x_ntrack;
+    unsigned int x_dopitch:1;
+    unsigned int x_donote:1;
+    unsigned int x_dotracks:1;
+} t_sigmund;
+
+static void sigmund_clock(t_sigmund *x);
+static void sigmund_clear(t_sigmund *x);
+static void sigmund_npts(t_sigmund *x, t_floatarg f);
+static void sigmund_hop(t_sigmund *x, t_floatarg f);
+static void sigmund_npeak(t_sigmund *x, t_floatarg f);
+static void sigmund_maxfreq(t_sigmund *x, t_floatarg f);
+static void sigmund_vibrato(t_sigmund *x, t_floatarg f);
+static void sigmund_stabletime(t_sigmund *x, t_floatarg f);
+static void sigmund_growth(t_sigmund *x, t_floatarg f);
+static void sigmund_minpower(t_sigmund *x, t_floatarg f);
+
+static void *sigmund_new(t_symbol *s, int argc, t_atom *argv)
+{
+    t_sigmund *x = (t_sigmund *)pd_new(sigmund_class);
+    x->x_param1 = 0;
+    x->x_param2 = 0.6;
+    x->x_param3 = 0;
+    x->x_npts = NPOINTS_DEF;
+    x->x_hop = HOP_DEF;
+    x->x_mode = MODE_STREAM;
+    x->x_npeak = NPEAK_DEF;
+    x->x_vibrato = VIBRATO_DEF;
+    x->x_stabletime = STABLETIME_DEF;
+    x->x_growth = GROWTH_DEF;
+    x->x_minpower = MINPOWER_DEF;
+    x->x_maxfreq = 1000000;
+    x->x_loud = 0;
+    x->x_sr = 1;
+    x->x_nvarout = 0;
+    x->x_varoutv = (t_varout *)getbytes(0);
+    x->x_trackv = 0;
+    x->x_ntrack = 0;
+    x->x_dopitch = x->x_donote = x->x_dotracks = 0;
+    
+    while (argc > 0)
+    {
+        t_symbol *firstarg = atom_getsymbolarg(0, argc, argv);
+        if (!strcmp(firstarg->s_name, "-t"))
+        {
+            x->x_mode = MODE_TABLE;
+            argc--, argv++;
+        }
+        else if (!strcmp(firstarg->s_name, "-s"))
+        {
+            x->x_mode = MODE_STREAM;
+            argc--, argv++;
+        }
+#if 0
+        else if (!strcmp(firstarg->s_name, "-b"))
+        {
+            x->x_mode = MODE_BLOCK;
+            argc--, argv++;
+        }
+#endif
+        else if (!strcmp(firstarg->s_name, "-npts") && argc > 1)
+        {
+            sigmund_npts(x, atom_getfloatarg(1, argc, argv));
+            argc -= 2; argv += 2;
+        }
+        else if (!strcmp(firstarg->s_name, "-hop") && argc > 1)
+        {
+            sigmund_hop(x, atom_getfloatarg(1, argc, argv));
+            argc -= 2; argv += 2;
+        }
+        else if (!strcmp(firstarg->s_name, "-npeak") && argc > 1)
+        {
+            sigmund_npeak(x, atom_getfloatarg(1, argc, argv));
+            argc -= 2; argv += 2;
+        }
+        else if (!strcmp(firstarg->s_name, "-maxfreq") && argc > 1)
+        {
+            sigmund_maxfreq(x, atom_getfloatarg(1, argc, argv));
+            argc -= 2; argv += 2;
+        }
+        else if (!strcmp(firstarg->s_name, "-vibrato") && argc > 1)
+        {
+            sigmund_vibrato(x, atom_getfloatarg(1, argc, argv));
+            argc -= 2; argv += 2;
+        }
+        else if (!strcmp(firstarg->s_name, "-stabletime") && argc > 1)
+        {
+            sigmund_stabletime(x, atom_getfloatarg(1, argc, argv));
+            argc -= 2; argv += 2;
+        }
+        else if (!strcmp(firstarg->s_name, "-growth") && argc > 1)
+        {
+            sigmund_growth(x, atom_getfloatarg(1, argc, argv));
+            argc -= 2; argv += 2;
+        }
+        else if (!strcmp(firstarg->s_name, "-minpower") && argc > 1)
+        {
+            sigmund_minpower(x, atom_getfloatarg(1, argc, argv));
+            argc -= 2; argv += 2;
+        }
+        else if (!strcmp(firstarg->s_name, "pitch"))
+        {
+            int n2 = x->x_nvarout+1;
+            x->x_varoutv = (t_varout *)t_resizebytes(x->x_varoutv,
+                x->x_nvarout*sizeof(t_varout), n2*sizeof(t_varout));
+            x->x_varoutv[x->x_nvarout].v_outlet =
+                outlet_new(&x->x_obj, &s_float);
+            x->x_varoutv[x->x_nvarout].v_what = OUT_PITCH;
+            x->x_nvarout = n2;
+            x->x_dopitch = 1;
+            argc--, argv++;
+        }
+        else if (!strcmp(firstarg->s_name, "env"))
+        {
+            int n2 = x->x_nvarout+1;
+            x->x_varoutv = (t_varout *)t_resizebytes(x->x_varoutv,
+                x->x_nvarout*sizeof(t_varout), n2*sizeof(t_varout));
+            x->x_varoutv[x->x_nvarout].v_outlet =
+                outlet_new(&x->x_obj, &s_float);
+            x->x_varoutv[x->x_nvarout].v_what = OUT_ENV;
+            x->x_nvarout = n2;
+            argc--, argv++;
+        }
+        else if (!strcmp(firstarg->s_name, "note")
+            || !strcmp(firstarg->s_name, "notes"))
+        {
+            int n2 = x->x_nvarout+1;
+            x->x_varoutv = (t_varout *)t_resizebytes(x->x_varoutv,
+                x->x_nvarout*sizeof(t_varout), n2*sizeof(t_varout));
+            x->x_varoutv[x->x_nvarout].v_outlet =
+                outlet_new(&x->x_obj, &s_float);
+            x->x_varoutv[x->x_nvarout].v_what = OUT_NOTE;
+            x->x_nvarout = n2;
+            x->x_dopitch = x->x_donote = 1;
+            argc--, argv++;
+        }
+        else if (!strcmp(firstarg->s_name, "peaks"))
+        {
+            int n2 = x->x_nvarout+1;
+            x->x_varoutv = (t_varout *)t_resizebytes(x->x_varoutv,
+                x->x_nvarout*sizeof(t_varout), n2*sizeof(t_varout));
+            x->x_varoutv[x->x_nvarout].v_outlet =
+                outlet_new(&x->x_obj, &s_list);
+            x->x_varoutv[x->x_nvarout].v_what = OUT_PEAKS;
+            x->x_nvarout = n2;
+            argc--, argv++;
+        }
+        else if (!strcmp(firstarg->s_name, "tracks"))
+        {
+            int n2 = x->x_nvarout+1;
+            x->x_varoutv = (t_varout *)t_resizebytes(x->x_varoutv,
+                x->x_nvarout*sizeof(t_varout), n2*sizeof(t_varout));
+            x->x_varoutv[x->x_nvarout].v_outlet =
+                outlet_new(&x->x_obj, &s_list);
+            x->x_varoutv[x->x_nvarout].v_what = OUT_TRACKS;
+            x->x_nvarout = n2;
+            x->x_dotracks = 1;
+            argc--, argv++;
+        }
+        else
+        {
+            pd_error(x, "sigmund: %s: unknown flag or argument missing",
+                firstarg->s_name);
+            argc--, argv++;
+        }
+    }
+    if (!x->x_nvarout)
+    {
+        x->x_varoutv = (t_varout *)t_resizebytes(x->x_varoutv,
+            0, 2*sizeof(t_varout));
+        x->x_varoutv[0].v_outlet = outlet_new(&x->x_obj, &s_float);
+        x->x_varoutv[0].v_what = OUT_PITCH;
+        x->x_varoutv[1].v_outlet = outlet_new(&x->x_obj, &s_float);
+        x->x_varoutv[1].v_what = OUT_ENV;
+        x->x_nvarout = 2;
+        x->x_dopitch = 1;
+    }
+    if (x->x_dotracks)
+    {
+        x->x_ntrack = x->x_npeak;
+        x->x_trackv = (t_peak *)getbytes(x->x_ntrack * sizeof(*x->x_trackv));
+    }
+    x->x_clock = clock_new(&x->x_obj.ob_pd, (t_method)sigmund_clock);
+    
+        /* check parameter ranges */
+    if (x->x_npts < NPOINTS_MIN)
+        post("sigmund~: minimum points %d", NPOINTS_MIN),
+            x->x_npts = NPOINTS_MIN;
+    if (x->x_npts != (1 << sigmund_ilog2(x->x_npts)))
+        post("sigmund~: adjusting analysis size to %d points",
+            (x->x_npts = (1 << sigmund_ilog2(x->x_npts))));
+    if (x->x_hop != (1 << sigmund_ilog2(x->x_hop)))
+        post("sigmund~: adjusting hop size to %d points",
+            (x->x_hop = (1 << sigmund_ilog2(x->x_hop))));
+    if (x->x_mode == MODE_STREAM)
+        x->x_inbuf = getbytes(sizeof(*x->x_inbuf) * x->x_npts);
+    else x->x_inbuf = 0;
+    x->x_infill = 0;
+    x->x_countdown = 0;
+    notefinder_init(&x->x_notefinder);
+    sigmund_clear(x);
+    return (x);
+}
+
+static void sigmund_doit(t_sigmund *x, int npts, float *arraypoints,
+    int loud, float srate)
+{
+    t_peak *peakv = (t_peak *)alloca(sizeof(t_peak) * x->x_npeak);
+    int nfound, i, cnt;
+    float freq = 0, power, note = 0;
+    sigmund_getrawpeaks(npts, arraypoints, x->x_npeak, peakv,
+        &nfound, &power, srate, loud, x->x_param1, x->x_param2, x->x_param3,
+        x->x_maxfreq);
+    if (x->x_dopitch)
+        sigmund_getpitch(nfound, peakv, &freq, npts, srate, loud);
+    if (x->x_donote)
+        notefinder_doit(&x->x_notefinder, freq, power, &note, x->x_vibrato, 
+            x->x_stabletime * 0.001f * x->x_sr / (float)x->x_hop,
+                exp(LOG10*0.1*(x->x_minpower - 100)), x->x_growth, loud);
+    if (x->x_dotracks)
+        sigmund_peaktrack(nfound, peakv, x->x_ntrack, x->x_trackv, loud);
+    
+    for (cnt = x->x_nvarout; cnt--;)
+    {
+        t_varout *v = &x->x_varoutv[cnt];
+        switch (v->v_what)
+        {
+        case OUT_PITCH:
+            outlet_float(v->v_outlet, ftom(freq));
+            break;
+        case OUT_ENV:
+            outlet_float(v->v_outlet, powtodb(power));
+            break;
+        case OUT_NOTE:
+            if (note > 0)
+                outlet_float(v->v_outlet, ftom(note));
+            break;
+        case OUT_PEAKS:
+            for (i = 0; i < nfound; i++)
+            {
+                t_atom at[5];
+                SETFLOAT(at, (float)i);
+                SETFLOAT(at+1, peakv[i].p_freq);
+                SETFLOAT(at+2, 2*peakv[i].p_amp);
+                SETFLOAT(at+3, 2*peakv[i].p_ampreal);
+                SETFLOAT(at+4, 2*peakv[i].p_ampimag);
+                outlet_list(v->v_outlet, &s_list, 5, at);   
+            }
+            break;
+        case OUT_TRACKS:
+            for (i = 0; i < x->x_ntrack; i++)
+            {
+                t_atom at[4];
+                SETFLOAT(at, (float)i);
+                SETFLOAT(at+1, x->x_trackv[i].p_freq);
+                SETFLOAT(at+2, 2*x->x_trackv[i].p_amp);
+                SETFLOAT(at+3, x->x_trackv[i].p_tmp);
+                outlet_list(v->v_outlet, &s_list, 4, at);   
+            }
+            break;
+        }
+    }
+}
+
+static void sigmund_list(t_sigmund *x, t_symbol *s, int argc, t_atom *argv)
+{
+    t_symbol *syminput = atom_getsymbolarg(0, argc, argv);
+    int npts = atom_getintarg(1, argc, argv);
+    int onset = atom_getintarg(2, argc, argv);
+    float srate = atom_getfloatarg(3, argc, argv);
+    int loud = atom_getfloatarg(4, argc, argv);
+    int arraysize, totstorage, nfound, i;
+    t_garray *a;
+    float *arraypoints, pit;
+    
+    if (argc < 5)
+    {
+        post(
+         "sigmund: array-name, npts, array-onset, samplerate, loud");
+        return;
+    }
+    if (npts < 64 || npts != (1 << ilog2(npts))) 
+    {
+        error("sigmund: bad npoints");
+        return;
+    }
+    if (onset < 0)
+    {
+        error("sigmund: negative onset");
+        return;
+    }
+    
+    if (!(a = (t_garray *)pd_findbyclass(syminput, garray_class)) ||
+        !garray_getfloatarray(a, &arraysize, &arraypoints) ||
+            arraysize < onset + npts)
+    {
+        error("%s: array missing or too small", syminput->s_name);
+        return;
+    }
+    if (arraysize < npts)
+    {
+        error("sigmund~: too few points in array");
+        return;
+    }
+    sigmund_doit(x, npts, arraypoints+onset, loud, srate);
+}
+
+static void sigmund_clear(t_sigmund *x)
+{
+    if (x->x_trackv)
+        memset(x->x_trackv, 0, x->x_ntrack * sizeof(*x->x_trackv));
+    x->x_infill = x->x_countdown = 0;
+}
+
+    /* these are for testing; their meanings vary... */
+static void sigmund_param1(t_sigmund *x, t_floatarg f)
+{
+    x->x_param1 = f;
+}
+
+static void sigmund_param2(t_sigmund *x, t_floatarg f)
+{
+    x->x_param2 = f;
+}
+
+static void sigmund_param3(t_sigmund *x, t_floatarg f)
+{
+    x->x_param3 = f;
+}
+
+static void sigmund_npts(t_sigmund *x, t_floatarg f)
+{
+    x->x_npts = f;
+        /* check parameter ranges */
+    if (x->x_npts < NPOINTS_MIN)
+        post("sigmund~: minimum points %d", NPOINTS_MIN),
+            x->x_npts = NPOINTS_MIN;
+    if (x->x_npts != (1 << sigmund_ilog2(x->x_npts)))
+        post("sigmund~: adjusting analysis size to %d points",
+            (x->x_npts = (1 << sigmund_ilog2(x->x_npts))));
+}
+
+static void sigmund_hop(t_sigmund *x, t_floatarg f)
+{
+    x->x_hop = f;
+        /* check parameter ranges */
+    if (x->x_hop != (1 << sigmund_ilog2(x->x_hop)))
+        post("sigmund~: adjusting analysis size to %d points",
+            (x->x_hop = (1 << sigmund_ilog2(x->x_hop))));
+}
+
+static void sigmund_npeak(t_sigmund *x, t_floatarg f)
+{
+    if (f < 1)
+        f = 1;
+    x->x_npeak = f;
+}
+
+static void sigmund_maxfreq(t_sigmund *x, t_floatarg f)
+{
+    x->x_maxfreq = f;
+}
+
+static void sigmund_vibrato(t_sigmund *x, t_floatarg f)
+{
+    if (f < 0)
+        f = 0;
+    x->x_vibrato = f;
+}
+
+static void sigmund_stabletime(t_sigmund *x, t_floatarg f)
+{
+    if (f < 0)
+        f = 0;
+    x->x_stabletime = f;
+}
+
+static void sigmund_growth(t_sigmund *x, t_floatarg f)
+{
+    if (f < 0)
+        f = 0;
+    x->x_growth = f;
+}
+
+static void sigmund_minpower(t_sigmund *x, t_floatarg f)
+{
+    if (f < 0)
+        f = 0;
+    x->x_minpower = f;
+}
+
+static void sigmund_print(t_sigmund *x)
+{
+    post("sigmund~ settings:");
+    post("npts %d", (int)x->x_npts);
+    post("hop %d", (int)x->x_hop);
+    post("npeak %d", (int)x->x_npeak);
+    post("maxfreq %g", x->x_maxfreq);
+    post("vibrato %g", x->x_vibrato);
+    post("stabletime %g", x->x_stabletime);
+    post("growth %g", x->x_growth);
+    post("minpower %g", x->x_minpower);
+}
+
+static void sigmund_printnext(t_sigmund *x, t_float f)
+{
+    x->x_loud = f;
+}
+
+static void sigmund_clock(t_sigmund *x)
+{
+    if (x->x_infill == x->x_npts)
+    {
+        sigmund_doit(x, x->x_npts, x->x_inbuf, x->x_loud, x->x_sr);
+        if (x->x_hop >= x->x_npts)
+        {
+            x->x_infill = 0;
+            x->x_countdown = x->x_hop - x->x_npts;
+        }
+        else
+        {
+            memmove(x->x_inbuf, x->x_inbuf + x->x_hop,
+                (x->x_infill = x->x_npts - x->x_hop) * sizeof(*x->x_inbuf));
+            x->x_countdown = 0;
+        }
+        x->x_loud = 0;
+    }
+}
+
+static t_int *sigmund_perform(t_int *w)
+{
+    t_sigmund *x = (t_sigmund *)(w[1]);
+    float *in = (float *)(w[2]);
+    int n = (int)(w[3]);
+
+    if (x->x_countdown > 0)
+        x->x_countdown -= n;
+    else if (x->x_infill != x->x_npts)
+    {
+        int i, j;
+        float *fp = x->x_inbuf + x->x_infill;
+        for (j = 0; j < n; j++)
+            *fp++ = *in++;
+        x->x_infill += n;
+        if (x->x_infill == x->x_npts)
+            clock_delay(x->x_clock, 0);
+    }
+    return (w+4);
+}
+
+static void sigmund_dsp(t_sigmund *x, t_signal **sp)
+{
+    if (x->x_mode == MODE_STREAM)
+    {
+        if (x->x_hop % sp[0]->s_n)
+            post("sigmund: adjusting hop size to %d",
+                (x->x_hop = sp[0]->s_n * (x->x_hop / sp[0]->s_n)));
+        x->x_sr = sp[0]->s_sr;
+        dsp_add(sigmund_perform, 3, x, sp[0]->s_vec, sp[0]->s_n);
+    }
+}
+
+static void sigmund_free(t_sigmund *x)
+{
+    if (x->x_inbuf)
+        freebytes(x->x_inbuf, x->x_npts * sizeof(*x->x_inbuf));
+    if (x->x_trackv)
+        freebytes(x->x_trackv, x->x_ntrack * sizeof(*x->x_trackv));
+    clock_free(x->x_clock);
+}
+
+void sigmund_tilde_setup(void)
+{
+    sigmund_class = class_new(gensym("sigmund~"), (t_newmethod)sigmund_new,
+        (t_method)sigmund_free, sizeof(t_sigmund), 0, A_GIMME, 0);
+    class_addlist(sigmund_class, sigmund_list);
+    class_addmethod(sigmund_class, (t_method)sigmund_dsp, gensym("dsp"), 0);
+    CLASS_MAINSIGNALIN(sigmund_class, t_sigmund, x_f);
+    class_addmethod(sigmund_class, (t_method)sigmund_param1,
+        gensym("param1"), A_FLOAT, 0);
+    class_addmethod(sigmund_class, (t_method)sigmund_param2,
+        gensym("param2"), A_FLOAT, 0);
+    class_addmethod(sigmund_class, (t_method)sigmund_param3,
+        gensym("param3"), A_FLOAT, 0);
+    class_addmethod(sigmund_class, (t_method)sigmund_npts,
+        gensym("npts"), A_FLOAT, 0);
+    class_addmethod(sigmund_class, (t_method)sigmund_hop,
+        gensym("hop"), A_FLOAT, 0);
+    class_addmethod(sigmund_class, (t_method)sigmund_maxfreq,
+        gensym("maxfreq"), A_FLOAT, 0);
+    class_addmethod(sigmund_class, (t_method)sigmund_npeak,
+        gensym("npeak"), A_FLOAT, 0);
+    class_addmethod(sigmund_class, (t_method)sigmund_vibrato,
+        gensym("vibrato"), A_FLOAT, 0);
+    class_addmethod(sigmund_class, (t_method)sigmund_stabletime,
+        gensym("stabletime"), A_FLOAT, 0);
+    class_addmethod(sigmund_class, (t_method)sigmund_growth,
+        gensym("growth"), A_FLOAT, 0);
+    class_addmethod(sigmund_class, (t_method)sigmund_minpower,
+        gensym("minpower"), A_FLOAT, 0);
+    class_addmethod(sigmund_class, (t_method)sigmund_print,
+        gensym("print"), 0);
+    class_addmethod(sigmund_class, (t_method)sigmund_printnext,
+        gensym("printnext"), A_FLOAT, 0);
+    post("sigmund version 0.02");
+}
+