1 files changed, 11 insertions, 30 deletions

diff --git a/plugins/MacAU/SideDull/SideDull.cpp b/plugins/MacAU/SideDull/SideDull.cpp
index 72793e5..2b75d72 100755
--- a/plugins/MacAU/SideDull/SideDull.cpp
+++ b/plugins/MacAU/SideDull/SideDull.cpp
@@ -176,11 +176,8 @@ ComponentResult		SideDull::Reset(AudioUnitScope inScope, AudioUnitElement inElem
 	iirSampleA = 0.0;
 	iirSampleB = 0.0;
 	flip = true;
-	fpNShapeAL = 0.0;
-	fpNShapeBL = 0.0;
-	fpNShapeAR = 0.0;
-	fpNShapeBR = 0.0;
-	
+	fpNShapeL = 0.0;
+	fpNShapeR = 0.0;	
 	return noErr;
 }
 
@@ -209,10 +206,6 @@ OSStatus		SideDull::ProcessBufferLists(AudioUnitRenderActionFlags & ioActionFlag
 	overallscale *= GetSampleRate();
 	Float64 iirAmount = pow(GetParameter( kParam_One ),3)/overallscale;
 	
-	Float32 fpTemp;
-	Float64 fpOld = 0.618033988749894848204586; //golden ratio!
-	Float64 fpNew = 1.0 - fpOld;	
-	
 	while (nSampleFrames-- > 0) {
 		inputSampleL = *inputL;
 		inputSampleR = *inputR;
@@ -273,28 +266,16 @@ OSStatus		SideDull::ProcessBufferLists(AudioUnitRenderActionFlags & ioActionFlag
 		
 		inputSampleL = (mid+side)/2.0;
 		inputSampleR = (mid-side)/2.0;
-		
-		//noise shaping to 32-bit floating point
-		if (flip) {
-			fpTemp = inputSampleL;
-			fpNShapeAL = (fpNShapeAL*fpOld)+((inputSampleL-fpTemp)*fpNew);
-			inputSampleL += fpNShapeAL;
-			
-			fpTemp = inputSampleR;
-			fpNShapeAR = (fpNShapeAR*fpOld)+((inputSampleR-fpTemp)*fpNew);
-			inputSampleR += fpNShapeAR;
-		}
-		else {
-			fpTemp = inputSampleL;
-			fpNShapeBL = (fpNShapeBL*fpOld)+((inputSampleL-fpTemp)*fpNew);
-			inputSampleL += fpNShapeBL;
-			
-			fpTemp = inputSampleR;
-			fpNShapeBR = (fpNShapeBR*fpOld)+((inputSampleR-fpTemp)*fpNew);
-			inputSampleR += fpNShapeBR;
-		}
 		flip = !flip;
-		//end noise shaping on 32 bit output
+		
+		//stereo 32 bit dither, made small and tidy.
+		int expon; frexpf((Float32)inputSampleL, &expon);
+		long double dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
+		inputSampleL += (dither-fpNShapeL); fpNShapeL = dither;
+		frexpf((Float32)inputSampleR, &expon);
+		dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
+		inputSampleR += (dither-fpNShapeR); fpNShapeR = dither;
+		//end 32 bit dither
 		
 		*outputL = inputSampleL;
 		*outputR = inputSampleR;