Mapped oscillator pulse width to modulation wheel.

include/synth.h

@@ -3,7 +3,7 @@
 
 #include <stdint.h>
 
-#define VOICE_COUNT 8
+#define VOICE_COUNT 16
 
 typedef enum {
     WAVE_SINE,

source/midi.c

@@ -96,12 +96,18 @@ void *midiThread(void *arg)
                     synthNoteOff(m->synth, ev->data.note.note);
                     break;
                 case SND_SEQ_EVENT_CONTROLLER:
+                    // This are controller parameter changes.
+                    // Map the Mod Wheel to PWM:
+                    if (ev->data.control.param == 1)
+                        m->synth->dutyCycle = 0.05f + (ev->data.control.value / 127.0f) * 0.90f;
+                    // This naively maps parameter 70 to the waveform in a way that does not play so nice with real pots.
                     if (ev->data.control.param == 70)
                         m->synth->waveform = ev->data.control.value % WAVE_COUNT;
                 break;
                 case SND_SEQ_EVENT_PITCHBEND:
                     m->synth->pitchBend = ev->data.control.value / 8191.0f;
                 break;
+
             }
             snd_seq_free_event(ev);
             ev = NULL;

source/soundThing.c

@@ -79,6 +79,8 @@ int main(void)
                  20, 55, 20, RAYWHITE);
         DrawText(TextFormat("MIDI: client %d port %d", gMidi.client, gMidi.port),
                  20, 90, 20, GRAY);
+        if (gSynth.waveform == WAVE_PULSE)
+            DrawText(TextFormat("Duty Cycle: %.2f", gSynth.dutyCycle), 20, 280, 20, GREEN);
 
         EndDrawing();
     }