1 files changed, 33 insertions, 0 deletions
diff --git a/modules/eadsr~.c b/modules/eadsr~.c
index d2a1968..d3d0720 100644
--- a/modules/eadsr~.c
+++ b/modules/eadsr~.c
@@ -178,3 +178,36 @@ void eadsr_tilde_setup(void)
 
 }
 
+/*
+ *   Utility functions for exponential decay 
+ *   Copyright (c) 2000-2003 by Tom Schouten
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+
+#include "extlib_util.h"
+
+float milliseconds_2_one_minus_realpole(float time)
+{
+  float r;
+
+  if (time < 0.0f) time = 0.0f;
+  r = -expm1(1000.0f * log(ENVELOPE_RANGE) / (sys_getsr() * time));
+  if (!(r < 1.0f)) r = 1.0f;
+
+  //post("%f",r);
+  return r;
+}