pupil.fft.p5.js

let fft, mic, waveform, spectrum;

function setupAudio(){
	userStartAudio();
	
	mic = new p5.AudioIn();
	mic.start();
	fft = new p5.FFT(0, 2048);
	fft.setInput(mic);
}

function updateAudio(){
	spectrum = fft.analyze();
	waveform = fft.waveform();
}

function setup() {
	createCanvas(windowWidth, windowHeight);
	
	setupAudio();
	background(30);
}

function draw(){
	
	updateAudio();
	colorMode(RGB)
	background(30, 1);
	stroke(255);
	noFill();
	
	colorMode(HSB, 255)
	translate(width/2, height/2)
	rotate(frameCount);
	for(let i = 0; i < spectrum.length; i++ ){
		let x = map(i, 0, spectrum.length,0, width/2);
		let y = map(spectrum[i], 0, 255, height/2, 0);

		stroke(spectrum[i], 255, 200);
		line(x, height/2, x,y);
	}
}