=== modified file 'plugin/inv_delay.c'
--- plugin/inv_delay.c	2009-08-16 23:35:33 +0000
+++ plugin/inv_delay.c	2012-01-02 02:15:15 +0000
@@ -28,6 +28,8 @@
 #include "library/common.h"
 #include "inv_delay.h"
 
+#define SMALL_TO_ZERO(f) if (fabs(f) < 1e-16) f = 0;
+
 static LV2_Descriptor *IDelayMonoDescriptor = NULL;
 static LV2_Descriptor *IDelaySumDescriptor = NULL;
 
@@ -906,7 +908,9 @@
 			}
 
 			// munge it
+			SMALL_TO_ZERO(In1FBmix);
 			In1FB	= (1-fMunge)*In1FBmix + fMunge*ITube_do(In1FBmix,1+fMunge);
+			SMALL_TO_ZERO(In2FBmix);
 			In2FB	= (1-fMunge)*In2FBmix + fMunge*ITube_do(In2FBmix,1+fMunge);
 			HPF1 = ((fHPFsamples-1) * HPF1 + In1FB) / fHPFsamples;  
 			HPF2 = ((fHPFsamples-1) * HPF2 + In2FB) / fHPFsamples; 

=== modified file 'plugin/library/common.c'
--- plugin/library/common.c	2009-08-30 05:16:12 +0000
+++ plugin/library/common.c	2012-01-02 02:15:15 +0000
@@ -27,6 +27,7 @@
 #include <lv2.h>
 #include "common.h"
 
+#define SMALL_TO_ZERO(f) if (fabs(f) < 1e-16) f = 0;
 
 /* a function that checks to see if a control has been changed and calls the provided conversion fuction */
 void 
@@ -99,6 +100,8 @@
 {
 	float valueA;
 
+	SMALL_TO_ZERO(audio_value);
+	
 	valueA=fabs(audio_value);
 
 	return (valueA > envelope_value)  ? Env->attack * (valueA - envelope_value)  : Env->decay * (valueA - envelope_value);