TASK: Change to three modulated oscillators

Replace "waveform" with "waveformmod" and use two of those
and a pink noise source too.

synth.ino

@@ -6,23 +6,28 @@
 #include "NoteData.h"
 
 // GUItool: begin automatically generated code
-AudioSynthWaveform       waveform1;      //xy=291,219
-AudioOutputI2S           i2s1;           //xy=599,232
-AudioConnection          patchCord1(waveform1, 0, i2s1, 0);
-AudioConnection          patchCord2(waveform1, 0, i2s1, 1);
+AudioSynthWaveformModulated waveformMod1;   //xy=242,198
+AudioSynthWaveformModulated waveformMod2;   //xy=247,271
+AudioSynthNoisePink      pink1;          //xy=258,350
+AudioMixer4              mixer1;         //xy=485,232
+AudioOutputI2S           i2s1;           //xy=730,235
+AudioConnection          patchCord1(waveformMod1, 0, mixer1, 0);
+AudioConnection          patchCord2(waveformMod2, 0, mixer1, 1);
+AudioConnection          patchCord3(pink1, 0, mixer1, 2);
+AudioConnection          patchCord4(mixer1, 0, i2s1, 0);
+AudioConnection          patchCord5(mixer1, 0, i2s1, 1);
 AudioControlSGTL5000     sgtl5000_1;     //xy=489,53
 // GUItool: end automatically generated code
 
 
 void OnNoteOn(byte channel, byte note, byte velocity) {
   Serial.printf("ch: %u, note: %u, vel: %u\n", channel, note, velocity);
-  waveform1.frequency(tune_frequencies2_PGM[note]);
-  waveform1.amplitude(1.0);
-  waveform1.pulseWidth(0.15);
+  waveformMod1.frequency(tune_frequencies2_PGM[note]);
+  waveformMod1.amplitude(1.0);
 }
 
 void OnNoteOff(byte channel, byte note, byte velocity) {
-  waveform1.amplitude(0);
+  waveformMod1.amplitude(0);
   Serial.println("and off");
 }
 
@@ -31,7 +36,10 @@ void setup() {
   AudioMemory(20);
   sgtl5000_1.enable();
   sgtl5000_1.volume(0.5);
-  waveform1.begin(WAVEFORM_SINE);
+  waveformMod1.begin(WAVEFORM_SINE);
+  mixer1.gain(0, 0.3);
+  mixer1.gain(1, 0.3);
+  mixer1.gain(2, 0.3);
   usbMIDI.setHandleNoteOff(OnNoteOff);
   usbMIDI.setHandleNoteOn(OnNoteOn);
 }