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let mic;
function setup() {
createCanvas(400, 400);
mic = new p5.AudioIn();
mic.start();
noStroke();
fill(30);
}
function draw() {
background(220);
// get the loudness
let level = mic.getLevel();
//map the loudness from 0 - 1, to 5 - 200
level = map(level, 0, 1, 5, 200);
ellipse(200, 200, level);
}