Version 4.0

src/Modulate.cpp

@@ -0,0 +1,71 @@
+/***************************************************/
+/*! \class Modulate
+    \brief STK periodic/random modulator.
+
+    This class combines random and periodic
+    modulations to give a nice, natural human
+    modulation function.
+
+    by Perry R. Cook and Gary P. Scavone, 1995 - 2002.
+*/
+/***************************************************/
+
+#include "Modulate.h"
+#include <string.h>
+
+Modulate :: Modulate()
+{
+  // Concatenate the STK RAWWAVE_PATH to the rawwave file
+  char file[128];
+  strcpy(file, RAWWAVE_PATH);
+  vibrato = new WaveLoop( strcat(file,"rawwaves/sinewave.raw"), TRUE );
+  vibrato->setFrequency( 6.0 );
+  vibratoGain = 0.04;
+
+  noise = new SubNoise(330);
+  randomGain = 0.05;
+
+  filter = new OnePole( 0.999 );
+  filter->setGain( randomGain );
+}
+
+Modulate :: ~Modulate()
+{
+  delete vibrato;
+  delete noise;
+  delete filter;
+}
+
+void Modulate :: reset()
+{
+  lastOutput = (MY_FLOAT)  0.0;
+}
+
+void Modulate :: setVibratoRate(MY_FLOAT aRate)
+{
+  vibrato->setFrequency( aRate );
+}
+
+void Modulate :: setVibratoGain(MY_FLOAT aGain)
+{
+  vibratoGain = aGain;
+}
+
+void Modulate :: setRandomGain(MY_FLOAT aGain)
+{
+  randomGain = aGain;
+  filter->setGain( randomGain );
+}
+
+MY_FLOAT Modulate ::  tick()
+{
+  // Compute periodic and random modulations.
+  lastOutput = vibratoGain * vibrato->tick();
+  lastOutput += filter->tick( noise->tick() );
+  return lastOutput;                        
+}
+
+MY_FLOAT Modulate :: lastOut() const
+{
+  return lastOutput;
+}