let guitars = [];

let pianos = [];

let drums = [];

let reverb, delay;

let beatSpeed = 1;

let beat = 60;

let ratios = [1, 1.125, 1.25, 1.34, 1.5, 1.67, 1.875, 2]; // western major scale

​

// 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"));

  }

​

  //load drums

  for (let d = 0; d < 4; d++) {

    drums.push(loadSound("drum" + d + ".mp3"));

  }

}

​

function setup() {

  // 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

  // }

  randomSeed(0);

}

​

function draw() {

  beat += beatSpeed;

  if (beat < 30 || beat > 90) {

    beatSpeed *= -1;

  }

​

  // Play Guitar based on the ratio

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

    if (frameCount % (beat * (g + 1)) == 2) {

      // Pick a random harmonic ratio for melody

      let r = random(ratios);

      guitars[g].rate(r);

      guitars[g].play();

​

      // Apply occasional panning effect

      if (random() < 0.2) {

        guitars[g].pan(random(-1, 1));

      }

​

      // Play drums on even beats

      if (frameCount > 300 && g % 2 == 0) {

        drums[g % drums.length].play();

      }

​

//       if (random() < 0.2) {

//          pianos[g].play();

//        }

    }

  }

​

/*

    // Play Guitar based on the ratio

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

    if (frameCount % (beat * (g + 1)) == 2) {

      // Pick a random harmonic ratio for melody

      let r = random(ratios);

      drums[g].rate(r);

      drums[g].play();

    }

  }

*/

}

​