<!-- Any copyright is dedicated to the Public Domain. http://creativecommons.org/publicdomain/zero/1.0/ --> <!doctype html> <html> <head> <meta charset="utf-8"/> <title>Web Audio Editor test page</title> </head> <body> <script type="text/javascript;version=1.8"> "use strict"; let ctx = new AudioContext(); let audio = new Audio(); let meNode, msNode, mdNode; navigator.getUserMedia = navigator.getUserMedia || navigator.mozGetUserMedia; navigator.getUserMedia({ audio: true, fake: true }, stream => { meNode = ctx.createMediaElementSource(audio); msNode = ctx.createMediaStreamSource(stream); mdNode = ctx.createMediaStreamDestination(); }, () => {}); </script> </body> </html>