Diff: Audio/KarplusStrong.cpp

Revision:

15:aa5a4c350251

Parent:

13:bb0ec927e458

Child:

16:b25ca34a705f

--- a/Audio/KarplusStrong.cpp	Sun Apr 17 21:38:57 2016 +0000
+++ b/Audio/KarplusStrong.cpp	Sun Apr 17 21:59:03 2016 +0000
@@ -32,9 +32,15 @@
     // Copy over the calculated filter coefficient.
     filterCoefficient = nextFilterCoefficient;
     
-    // Get the noise sample from the static noise seed.
-    lastOutput = noiseSeed[bufferIndex] * velocity;
-    return lastOutput;
+    // Get the noise sample from the static noise seed while making room for character variation.
+    float noiseSample = noiseSeed[bufferIndex] * (1.0 - C::CHARACTER_VARIATION);
+    // Add in some character randomness to make it more realistic.
+    noiseSample += getRandSample() * C::CHARACTER_VARIATION;
+    // Account for velocity.
+    noiseSample *= velocity;
+    
+    lastOutput = noiseSample;
+    return noiseSample;
 }
 
 float KarplusStrong::processBuffer(const float inputSample) {
@@ -50,7 +56,7 @@
     int seedLength = (C::SAMPLE_RATE / C::MIN_FREQUENCY) + 1;
     for (int i = 0; i < seedLength; i++) {
         // Create a random number in [-1.0, 1.0]
-        noiseSeed[i] = 1.0 - 2.0 * getRand();   
+        noiseSeed[i] = getRandSample();   
     } 
 }