/* PDM Course: Sound Unit

  Preset-AlienChorus
*/

var synth;
// create a keyboard
var keyboard = new AudioKeys();

function setup() {
  synth = make_DuoSynth().instrument;

  console.log(synth);

  keyboard.down(note => {
    // convert MIDI velocity to gain
    var velToGain = map(note.velocity, 0, 127, 0, 1);
    synth.triggerAttack(note.frequency, Tone.now(), velToGain);
  });

  keyboard.up(note => synth.triggerRelease());
}

function make_DuoSynth() {
  // create synth
  var instrument = new Tone.DuoSynth();
  var synthJSON = {
    vibratoAmount: 0.5,
    vibratoRate: 10,
    harmonicity: 1.3,
    voice0: {
      volume: -10,
      portamento: 2,
      oscillator: {
        type: "square"
      },
      filterEnvelope: {
        attack: 0.01,
        decay: 0,
        sustain: 1,
        release: 0.5
      },
      envelope: {
        attack: 0.01,
        decay: 0,
        sustain: 1,
        release: 0.5
      }
    },
    voice1: {
      volume: -20,
      portamento: 0.02,
      oscillator: {
        type: "sine"
      },
      filterEnvelope: {
        attack: 0.01,
        decay: 0,
        sustain: 1,
        release: 0.5
      },
      envelope: {
        attack: 0.01,
        decay: 0,
        sustain: 1,
        release: 0.5
      }
    }
  };

  instrument.set(synthJSON);

  var effect1, effect2, effect3;

  // make connections
  instrument.connect(Tone.Destination);

  // define deep dispose function
  function deep_dispose() {
    if (instrument != undefined && instrument != null) {
      instrument.dispose();
      instrument = null;
    }
  }

  return {
    instrument: instrument,
    deep_dispose: deep_dispose
  };
}