0602envelopes

// remember to add the sound library : p5.sound

var osc; // this is a variable which we will use for an oscillator

var env; // this is a variable which we wlll use for the envelope

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(255);

  // take 0.1 seconds to get to level 1, then 0.5 seconds to get to level 0

  env = new p5.Envelope(0.01, 1, 0.3, 0); 

​

  osc = new p5.Oscillator(); // make an oscillator

  osc.setType('sine'); // options are 'sine', 'sawtooth', 'triangle', 'square'

  osc.start(); // start it

  osc.amp(0);

}

​

function draw() {

  line(pmouseX, pmouseY, mouseX, mouseY);

}

​

function mouseClicked()

{

  playit();

}

​

function playit()

{

  ellipse(mouseX, mouseY, 20, 20);

  osc.freq(mouseX); // frequency to the X axis (in Hz)

  env.mult(1-mouseY/height); // volume for the note

  env.play(osc);

}

​

​

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