Waving all the day

var wave, playing, a, env;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(100);

  wave = new p5.Oscillator();

  wave.setType('sin');

  wave.freq(262);

  //wave.start();

  a = [262, 294, 330, 349, 392, 440, 494];

  env = new p5.Env();

  env.setADSR(1, 1, 1, 1);

  env.setRange(1, 0);

}

​

function draw() {

}

​

function keyPressed() {

  switch(key) {

    case '1':

      wave.freq(a[0]);

      break;

    case '2':

      wave.freq(a[1]);

      break;

    case '3':

      wave.freq(a[2]);

      break;

    case '4':

      wave.freq(a[3]);

      break;

    case '5':

      wave.freq(a[4]);

      break;

    case '6':

      wave.freq(a[5]);

      break;

    case '7':

      wave.freq(a[6]);

      break;

  }

  wave.amp(env);

  env.play;

}

​

function mouseClicked() {

  if (playing) {

    wave.stop();

    playing = false;

  } else {

    wave.start();

    playing = true;

  }

}