arduino/MIDIUSB_Mozzi_adsr/MIDIUSB_Mozzi_adsr.ino

   1 /*
   2  * MIDIUSB_buzzer.ino
   3  *
   4  * Author: Paulo Costa
   5  */
   6
   7 #include <MozziGuts.h>
   8 #include <MIDIUSB.h>
   9 #include <pitchToFrequency.h>
  10 #include <Oscil.h> // oscillator template
  11 #include <tables/sin2048_int8.h> // sine table for oscillator
  12 #include <mozzi_midi.h>
  13 #include <ADSR.h>
  14
  15 // use: Oscil <table_size, update_rate> oscilName (wavetable), look in .h file of table #included above
  16 Oscil <SIN2048_NUM_CELLS, AUDIO_RATE> aSin(SIN2048_DATA);
  17
  18 ADSR <CONTROL_RATE, AUDIO_RATE> envelope;
  19
  20 const char* pitch_name(byte pitch) {
  21   static const char* names[] = {"C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B"};
  22   return names[pitch % 12];
  23 }
  24
  25 int pitch_octave(byte pitch) {
  26   return (pitch / 12) - 1;
  27 }
  28
  29 void noteOn(byte channel, byte pitch, byte velocity) {
  30   aSin.setFreq(pitchFrequency[pitch]);
  31   envelope.noteOn();
  32
  33   Serial.print("Note On: ");
  34   Serial.print(pitch_name(pitch));
  35   Serial.print(pitch_octave(pitch));
  36   Serial.print(", channel=");
  37   Serial.print(channel);
  38   Serial.print(", velocity=");
  39   Serial.println(velocity);
  40 }
  41
  42 void noteOff(byte channel, byte pitch, byte velocity) {
  43   //aSin.setFreq(0);
  44   envelope.noteOff();
  45
  46   Serial.print("Note Off: ");
  47   Serial.print(pitch_name(pitch));
  48   Serial.print(pitch_octave(pitch));
  49   Serial.print(", channel=");
  50   Serial.print(channel);
  51   Serial.print(", velocity=");
  52   Serial.println(velocity);
  53 }
  54
  55 void controlChange(byte channel, byte control, byte value) {
  56   Serial.print("Control change: control=");
  57   Serial.print(control);
  58   Serial.print(", value=");
  59   Serial.print(value);
  60   Serial.print(", channel=");
  61   Serial.println(channel);
  62 }
  63
  64 void setup() {
  65   Serial.begin(115200);
  66     envelope.setADLevels(255,48);
  67   envelope.setTimes(150,200,700,200); // 700 is so the note will sustain 0.7 seconds unless a noteOff comes
  68
  69   aSin.setFreq(440); // default frequency
  70    startMozzi(CONTROL_RATE);
  71 }
  72 void updateControl(){
  73   envelope.update();
  74 }
  75
  76
  77 AudioOutput_t updateAudio(){
  78   return MonoOutput::from16Bit(envelope.next() * aSin.next()); // return an int signal centred around 0
  79 }
  80
  81 void loop() {
  82   audioHook();
  83   midiEventPacket_t rx = MidiUSB.read();
  84   switch (rx.header) {
  85     case 0:
  86       break; //No pending events
  87
  88     case 0x9:
  89       noteOn(
  90         rx.byte1 & 0xF,  //channel
  91         rx.byte2,        //pitch
  92         rx.byte3         //velocity
  93       );
  94       break;
  95
  96     case 0x8:
  97       noteOff(
  98         rx.byte1 & 0xF,  //channel
  99         rx.byte2,        //pitch
 100         rx.byte3         //velocity
 101       );
 102       break;
 103
 104     case 0xB:
 105       controlChange(
 106         rx.byte1 & 0xF,  //channel
 107         rx.byte2,        //control
 108         rx.byte3         //value
 109       );
 110       break;
 111
 112     default:
 113       Serial.print("Unhandled MIDI message: ");
 114       Serial.print(rx.header, HEX);
 115       Serial.print("-");
 116       Serial.print(rx.byte1, HEX);
 117       Serial.print("-");
 118       Serial.print(rx.byte2, HEX);
 119       Serial.print("-");
 120       Serial.println(rx.byte3, HEX);
 121   }
 122 }