​

// the list of songs:

var songs = ['songs1.mp3','songs2.mp3','songs3.mp3'];

​

var songCount = songs.length; // number of songs in the music dir

var currentSong = 0;          // current song number

​

function preload() {          // load the first song on preload

 song = loadSound('music/' + songs[currentSong]);

}

function setup() {

  createCanvas(400, 300);

}

​

function draw() {

  background(30, 20, 180);

  fill(255);

  // draw the song's name and current time in seconds:

  text(songs[currentSong], 20, 50);

  text(song.currentTime().toFixed(3), 20, 100);

}

​

function controlSound(input) {

  switch(input) {

    case 49:   // start/stop, press 1

      if (song.isPlaying()){

        song.stop();

      } else {

        song.play();

      }

      break;

    case 50:   // play/pause, press 2

      if (song.isPlaying()){

        song.pause();

      } else {

        song.play();

      }

      break;

    case 51:    // skip ahead, press 3

      // make sure the song number is valid, and increment:

      if (currentSong < songs.length-1) {

        currentSong++;

      } else {

        currentSong = 0;

      }

      // get new song:

      getSong(currentSong);

      break;

    case 52:    // skip back, press 4

      // in the first second, just rewind the current track:

      if (song.currentTime() > 1.0) {

        song.jump(0);

      // if more than a second has elapsed, then

      // make sure the song number is valid, and decrement:

      } else {

        if (currentSong > 0) {

          currentSong--;

        } else {

          currentSong = songs.length-1;

        }

        // get new song:

        getSong(currentSong);

      }

      break;

    case 53:    // fast forward, press 5

        song.rate(2.0);   // double the play speed

      if (!song.isPlaying()){

        song.play();

      }

      break;

    case 54:    // random song, press 6

      currentSong = Math.round(random(songCount));  // get a new song number

      getSong(currentSong);             // play it

      break;

  }

}

​

function getSong(songNumber) {

  if (songNumber < songs.length) {   // if the song number is in range

    if (song.isPlaying()) {

      song.stop();

    }

    // load a new song:

    song = loadSound('music/'+ songs[currentSong], resumePlay);

    return true;

  } else {        // if the song number was out of range, return false

    return false;

  }

}

​

function resumePlay() {

  // if the song isn't playing, play it

  if (song.isPlaying()){

    song.stop();

  } else {

    song.play();

  }

}

​

function keyReleased() {

  controlSound(keyCode);    // send the ASCII number of the key

}