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// Coding Train / Daniel Shiffman
// http://thecodingtrain.com
// Code for: https://youtu.be/q2IDNkUws-A
let mic;
function setup() {
createCanvas(200, 200);
mic = new p5.AudioIn();
mic.start();
}
function draw() {
background(0);
let vol = mic.getLevel();
ellipse(100, 100, 200, vol * 200);
}