/* PDM Course: Sound Unit

  Preset-AlienChorus
*/

var synth;
// create a keyboard
var keyboard = new AudioKeys();
var slider;
function setup() {
  synth = make_Noise().instrument;

  console.log(synth.noise._playbackRate);

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

  keyboard.up(note => synth.triggerRelease());
  
  slider = createSlider(0.1, 30, 0.1, 0);
  
}
function draw() {
  synth.noise._playbackRate = slider.value()
}

function make_Noise() {
  // create synth
  var instrument = new Tone.NoiseSynth();
  var synthJSON = {
    "noise": {
        "type": "pink",
        "playbackRate" : 0.1
    },
    "envelope": {
        "attack": 0.01,
        "decay": 2,
        "sustain": 0.5,
        "release": 3
    }
}

  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
  };
}