let filter;

​

function setup() {

  let cnv = createCanvas(100, 100);

  sound = loadSound('assets/frequency_range.mp3');

  //filter = new p5.LowPass();

   filter = new p5.HighPass();

  // filter = new p5.BandPass();

  sound.connect(filter);

}

​

function draw() {

  background(220);

  // set the frequency 

  let freq = 600;

  filter.freq(freq);

  // give the filter it's band (lower res = wider bandpass)

  filter.res(200);

}

​

function mousePressed() {

  if (sound.isPlaying()) {

    sound.stop();

  } else {

    sound.play();

  }

}