; Initialize the global variables. 

; Initialize the global variables. 

ksmps = 32

nchnls = 2

0dbfs = 1

​

instr 1

  kFreq randi 1000, 1, 1

  kHrms randh 15, 1, 1

  a1 buzz 1, kFreq, abs(kHrms)+1, -1

  chnset abs(kFreq)/1000, "freq"

  outs a1*.1, a1*.1

endin

​

`;

​

let csound;

let isPlaying = false;

let numberOfPlays = 0;

let fft = 0, freq = 0;

​

function startCsound() {

  console.log("loading... loaded!");

  csound = new CsoundObj();

  fft = csound.audioContext.createAnalyser();

  csound.getNode().connect(fft);

  csound.setOption('-m0d');

}

​

CsoundObj.initialize().then(() => {

  startCsound();

});

​

function setup() {

  createCanvas(400, 400);

}

​

function draw() {

  background(0, 0, 0, 10);

  if (isPlaying === false) {

    textAlign(CENTER, CENTER);

    fill(255);

    text("Click to start audio", width / 2, height / 2);

  }

  let freqData = new Uint8Array(fft.frequencyBinCount);

  fft.getByteFrequencyData(freqData);

​

  noStroke();

  if(csound) {

    csound.requestControlChannel("freq", () => freq = csound.getControlChannel("freq"));

  }

  fill(random(100, 255)*freq, random(100, 255)*freq, random(100, 255)*freq);

  for (let i = 0; i < freqData.length; i++) {

    let x = map(i, 0, freqData.length / 2, 0, width);

    let h = -height + map(freqData[i], 0, 255, height, 0);

    rect(x, height, width / freqData.length, h)

  }

}

​

function mousePressed() {

  if (csound && isPlaying === false) {    

    csound.compileOrc(orcCode);

    csound.start();

    csound.audioContext.resume();

    csound.readScore('i1 0 3600');

    isPlaying = true;

  }

  else{

    csound.stop();

    csound.reset();

    isPlaying = false;

  }

}