/* PDM Course: Sound Unit

  Preset-AlienChorus
*/

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

  
  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());
  
  slider = createSlider(0.5, 5, 0.5, 0);
  slider2 = createSlider(10, 20, 1, 0);

}
function draw() {
  synth.pitchDecay = slider.value()
  synth.octaves = slider2.value()
}

function make_Kick() {
  // create synth
  var instrument = new Tone.MembraneSynth();
  var synthJSON = {
	"pitchDecay"  : 0.05 ,
	"octaves"  : 10 ,
	"oscillator"  : {
		"type"  : "sine"
}  ,
	"envelope"  : {
		"attack"  : 0.001 ,
		"decay"  : 0.4 ,
		"sustain"  : 0.01 ,
		"release"  : 1.4 ,
		"attackCurve"  : "exponential"
	}
}


  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
  };
}