let guitars = [];

let pianos = [];

let reverb;

let delay;

let beatSpeed = 1;

let beat = 20;

​

// Load all the sounds

function preload() {

  //load guitars

  for (let g = 0; g < 6; g++) {

    guitars.push(loadSound("guitar" + g + ".mp3"));

  }

  //load pianos

  for (let p = 0; p < 7; p++) {

    pianos.push(loadSound("piano" + p + ".mp3"));

  }

}

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  reverb = new p5.Reverb();

  delay = new p5.Delay();

  for (let g = 0; g < guitars.length; g++) {

    reverb.process(guitars[g], 3, 2); // Reverb decay time: 3 seconds, damping: 2

    delay.process(guitars[g], 0.5, 0.5, 2300); // Delay time: 0.5s, feedback: 0.5

  }

}

​

function draw() {

  beat += beatSpeed;

  if (beat < 10 || beat > 30) {

    beatSpeed *= -1;

  }

  // Occasionally oscillate effect

  let triggerEffect = frameCount % 360 == 0; // Trigger every 360 frames

  let panValue = map(sin(frameCount * 0.02), -1, 1, -1, 1); // Oscillates between left (-1) and right (+1)

​

  let pan = map(beat, 10, 60, -1, 1);

​

  for (let g = 0; g < guitars.length; g++) {

    // play guitar according to beat by guitar index

    if (frameCount % floor(beat * (g + 1)) == 1) {

      guitars[g].play();

      if (triggerEffect) {

        guitars[g].pan(pan);

      }

    }

  }

​

  if (frameCount % 180 == 1) {

    pianos[6].play();

  }

}

​