Synth test

// IanM 2018

// https://www.openprocessing.org/user/78596/#sketches

//

​

// drum test

let playing = false

let oscA = ''

let oscB = ''

let oscC = ''

let noise = ''

let envA = ''

let envC = ''

​

let fft

​

let DRUMS = 4

let DRUMX = 100

let DRUMY = 100

let DRUMSP = 10

let DRUMW = 100

let DRUMH = 100

​

​

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(0,0,80)  

  fill('red')

  stroke('white')

  for (let i=0; i<DRUMS; i++) {

    rect(DRUMX + i*(DRUMW+DRUMSP), DRUMY, DRUMW, DRUMH, 20)

  }

  setupNotes()

  fft = new p5.FFT()

}

​

function draw() {

  fill(0,0,80)

  rect(0, windowHeight/2, windowWidth, windowHeight/2)

  let spectrum = fft.analyze();

  strokeWeight(2);

  stroke(0,0,80)

  fill(0,200,0); // spectrum is green

  for (var i = 0; i< spectrum.length/20; i++){

    fill(spectrum[i]/4, spectrum[i], 0)

    var x = map(i, 0, spectrum.length/20, 0, windowWidth);

    var h = map(spectrum[i], 0, 255, 0, windowHeight/2);

    rect(x, windowHeight - h, spectrum.length/20, h )

  }

/*

  var waveform = fft.waveform();

  noFill();

  beginShape();

  stroke(255,0,0); // waveform is red

  strokeWeight(1);

  for (var i = 0; i< waveform.length; i++){

    var x = map(i, 0, waveform.length, 0, width);

    var y = map( waveform[i], -1, 1, 0, height);

    vertex(x,y);

  }

  endShape();

  */

}

​

​

function setupNotes() {

  oscA = new p5.Oscillator();

  oscA.setType('triangle');

  oscA.freq(40);

  oscA.amp(0);

  oscA.start();

  oscB = new p5.Oscillator();

  oscB.setType('sine');

  oscB.freq(80);

  oscB.amp(0);

  oscB.start();

  noise = new p5.Noise()

  noise.start()

  noise.amp(0)

  envA = new p5.Env()

  envA.setADSR(0.001, 0.1, 0.2, 0.1)

  envA.setRange(1, 0)

​

  oscC = new p5.SinOsc()

  envC = new p5.Env()

  envC.setADSR(0.001, 0.5, 0.1, 0.5)

  envC.setRange(1,0)

  oscC.freq(440)

  oscC.amp(0);

  oscC.start()

​

}

​

​

​

function kick() {

    oscA.amp(1, 0.01);

    oscB.amp(1, 0.01);

    oscA.amp(0.001, 0.5);

    oscB.amp(0.001, 0.5);

    oscA.freq(120, 0.001)

    oscB.freq(50, 0.001)

    oscA.freq(0.001, 0.5)

    oscB.freq(0.001, 0.5)

}

​

function tap() {

  envA.play(noise)  

}

​

function tone() {

  envC.play(oscC, 0, 0.1) 

}

​

​

​

function mouseClicked() {

  if (mouseX > DRUMX && mouseX < DRUMX + DRUMS*(DRUMW+DRUMSP) && mouseY > DRUMY && mouseY < (DRUMY+DRUMH)) {

    let d = floor((mouseX - DRUMX)/(DRUMW+DRUMSP))

    switch(d) {

      case(0) : 

        kick()

        break

      case(1) : 

        tap()

        break

      case(2) : 

        tone()

        break

      case(3) : 

        kick()

        break

      default :

        break

    }

  }

}