let releaseLevel = 0;

let attackTime = 0.001;

let decayTime = 0.2;

let susPercent = 0.2;

let releaseTime = 0.5;

​

let env,triOsc;

​

function setup() {

  createCanvas(100, 100);

​

  env = new p5.Envelope();

  env.setADSR(attackTime, decayTime, susPercent, releaseTime);

  env.setRange(attackLevel, releaseLevel);

​

  triOsc = new p5.Oscillator('triangle');

  triOsc.amp(env);

  triOsc.start();

  triOsc.freq(220);

​

}

​

function draw(){

  myTimer();

} 

​

let startT=0, deltaT = 3000;

​

function myTimer() {

  if (millis() > startT + deltaT) {

    startT += deltaT;

    console.log("timer"); // do what ever you have to do here!

    env.play(triOsc);

  }

}

​