p5 Audio analysis with FFT

fft.p5.js

let fft, mic, waveform, spectrum;

function setupAudio(){
	userStartAudio();
	
	mic = new p5.AudioIn();
	mic.start();
	fft = new p5.FFT(0.9, 1024);
	fft.setInput(mic);
}

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

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

function draw(){
	updateAudio();
	background(30, 90);
	stroke(255);
	noFill();
	
	// Draw Circle
	push();
	translate(width / 2, height / 2);
	
	
	beginShape();
	for(let i = 0; i < waveform.length; i++ ){
		let angle = map(i, 0, waveform.length, 0, PI * 2)
		let x = sin(angle) * map(waveform[i], -1, 1, 0,height / 2);
		let y = cos(angle) * map(waveform[i], -1, 1, 0,height / 2); 		
		curveVertex(x,y);
	}
	endShape(CLOSE);
	pop();
	
	// Draw Line
	beginShape();
	for(let i = 0; i < spectrum.length; i++ ){
		let x = map(i, 0, spectrum.length, width/2 - height/4, width/2 + width /4);
		let y = map(spectrum[i], 0, 255, height/2, 0);
		
		vertex(x,y);
	}
	endShape();
}