Simple Mic Demo2

// Demonstrates contrast between two different lowpass filters. 

// Uses https://cdn.jsdelivr.net/npm/p5.sound@0.1.0

​

let theSlowVolume = 0;

let theFastVolume = 0;

let cx = 300;

let mic, amp; 

​

function setup() {

  let cnv = createCanvas(600, 400);

  cnv.mousePressed(userStartAudio);

​

  mic = new p5.AudioIn();

  mic.start();

  amp = new p5.Amplitude();

  mic.disconnect();

  mic.connect(amp);

}

​

//----------------------------------------------

function draw() {

  background(220);

​

  // Get the overall volume (between 0.0 and 1.0);

  // Smooth the volume variable with a running average

  let v = amp.getLevel();

  let smoothingFast = 0.05; // must be between 0...1

  let smoothingSlow = 0.95; // must be between 0...1

  theFastVolume = (smoothingFast * theFastVolume) + ((1-smoothingFast) * v);

  theSlowVolume = (smoothingSlow * theSlowVolume) + ((1-smoothingSlow) * v);

​

  fill('black');

  noStroke();

​

  let diamFast = map(theFastVolume, 0,1, 10,1000);

  circle(200, 150, diamFast);

  let diamSlow = map(theSlowVolume, 0,1, 10,1000);

  circle(400, 150, diamSlow);

  textAlign(CENTER);

  text(nf(theSlowVolume,1,5), 400,100);

  text(nf(theFastVolume,1,5), 200,100);

  let restX = 300;

  let hideX = 0; 

  let quietThresh = 0.02;

  let loudThresh = 0.10;

  if (theSlowVolume < quietThresh){

    cx = 0.9*cx + 0.1*restX;

  }

  if (theFastVolume > loudThresh){

    cx = 0.2*cx + 0.8*hideX;

  }

  text("say Boo!", cx,290);

  strokeWeight(12);

  stroke(0);

  line(cx, 300, cx, 400);

​

}

​