Floating Point Dither For All

1 files changed, 7 insertions, 0 deletions

diff --git a/plugins/MacAU/Slew/Slew.cpp b/plugins/MacAU/Slew/Slew.cpp
index 3c1a7bf..5eee0ab 100755
--- a/plugins/MacAU/Slew/Slew.cpp
+++ b/plugins/MacAU/Slew/Slew.cpp
@@ -159,6 +159,7 @@ ComponentResult Slew::Initialize()
 void		Slew::SlewKernel::Reset()
 {
 	lastSample = 0.0;
+	fpNShape = 0.0;
 }
 
 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -224,6 +225,12 @@ void		Slew::SlewKernel::Process(	const Float32 	*inSourceP,
 			outputSample = lastSample - threshold;
 		lastSample = outputSample;
 		
+		//32 bit dither, made small and tidy.
+		int expon; frexpf((Float32)outputSample, &expon);
+		long double dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
+		outputSample += (dither-fpNShape); fpNShape = dither;
+		//end 32 bit dither
+		
 		*destP = outputSample;
 		destP += inNumChannels;
 	}