cssAudio - Activefile-genericCSS - ActiveGeneric - ActiveHTML - ActiveImage - ActiveJS - ActiveSVG - ActiveText - Activefile-genericVideo - ActiveLovehtmlicon-new-collectionicon-personicon-teamlog-outoctocatpop-outspinnerstartv

Pen Settings

CSS Base

Vendor Prefixing

Add External CSS

These stylesheets will be added in this order and before the code you write in the CSS editor. You can also add another Pen here, and it will pull the CSS from it. Try typing "font" or "ribbon" below.

Quick-add: + add another resource

Add External JavaScript

These scripts will run in this order and before the code in the JavaScript editor. You can also link to another Pen here, and it will run the JavaScript from it. Also try typing the name of any popular library.

Quick-add: + add another resource

Code Indentation


Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

<section id="links">
  <a target="_blank" href="https://codepen.io/Rumyra/full/PbYGNB/">View over Https</a>
  <a target="_blank" href="https://codepen.io/Rumyra/post/audiovis-codevember-day-two-more-bridget">Read Blog Post</a>

<div id="screen">
              html {background:#efefef; font-family:"Lato", "Lucida Grande","Lucida Sans Unicode", Tahoma, Sans-Serif; letter-spacing:-0.2px;}
body {margin:0px; padding:0px;}
#links {
  display:flex; padding:5px;
  a {
    display:block; padding:5px 15px;
    border: 3px solid #343436; border-radius: 3px;
    text-align:center; text-decoration:none; color:#fff;
    &:hover {background-color:#4d4d50;}

    #screen {
      position: relative;
      width: 100vw; height: 100vh;
      background: black;
      display: flex;
      align-items: stretch;
    #screen section {
      background-color: white;
      background-image: linear-gradient(to bottom, black 50%, white 50%);
      background-size: 20vh 20vh;
    #screen section:nth-of-type(2n) {
      background-color: black;
      background-position: 0 10vh;
              // set up audio context
var audioContext = (window.AudioContext || window.webkitAudioContext);
// create audio class
if (audioContext) {
  // Web Audio API is available.
  var audioAPI = new audioContext();
} else {
  // Web Audio API is not available. Ask the user to use a supported browser.
  alert("Oh nos! It appears your browser does not support the Web Audio API, please upgrade or use a different browser");

// variables
var analyserNode,
    frequencyData = new Uint8Array(256);
const screen = document.querySelector('#screen'),
    allRepeatedEls = document.querySelectorAll('#screen section'),
    totalEls = allRepeatedEls.length;

// create an audio API analyser node and connect to source
function createAnalyserNode(audioSource) {
  analyserNode = audioAPI.createAnalyser();
  analyserNode.fftSize = 512;

// get's html elements, loops over them & attaches a frequency from analysed data - what you do is up to you!
function animateStuff() {

  for (let i=0; i<totalEls; i++) {

    var freqVol = frequencyData[i*16];

    if (freqVol <= 255 && freqVol > 150) {
      allRepeatedEls[i].style.flex = 2;
    } else if (freqVol <= 150 && freqVol > 90) {
      allRepeatedEls[i].style.flex = 1.5;
    } else if (freqVol <= 90 && freqVol > 40) {
      allRepeatedEls[i].style.flex = 0.5;
    } else { //50 or below
      allRepeatedEls[i].style.flex = 1;      


// getUserMedia success callback -> pipe audio stream into audio API
var gotStream = function(stream) {
    // Create an audio input from the stream.
    var audioSource = audioAPI.createMediaStreamSource(stream);

// pipe in analysing to getUserMedia
navigator.mediaDevices.getUserMedia({ audio: true, video: false })
Loading ..................