const synth = new Tone.Synth().toDestination();

// synth.oscillator.type = "triangle";

synth.oscillator.type = "sine";

// synth.oscillator.type = "sawtooth";

// synth.oscillator.type = "square";

// synth.oscillator.type = "pulse";

​

const filter = new Tone.Filter(500, "lowpass");

synth.chain(filter);

filter.toDestination();

​

​

let startButton;

let stopButton;

​

​

// how long should each period be 

synth.envelope.attack.value=0.01;

synth.envelope.decay.value=0.1;

synth.envelope.release.value=1;

​

​

​

​

​

function setup(){

  cnv = createCanvas(400, 400);

  startButton = createButton('start');

  stopButton = createButton('stop');

  startButton.mousePressed(startAudio);

  stopButton.mousePressed(stopAudio);

}

​

function startAudio(){

  Tone.start();

  // synth.triggerAttack("C4");

  synth.triggerAttackRelease("C4",1)

}

​

function stopAudio(){

  synth.triggerRelease();

}

​

function draw(){

  background(255);

  // drawAmplitude();

}

​

​

​