How to get audio input and audio output as one stream?

You may do it by the following code, (Using MediaStream Recording API approach)

var audioContext = new AudioContext();var mediaStreamDest = new MediaStreamAudioDestinationNode(audioContext);document.querySelectorAll("audio").forEach((e) => { var mediaElementSource = new MediaElementAudioSourceNode(audioContext, { mediaElement: e }); mediaElementSource.connect(mediaStreamDest);});console.log(mediaStreamDest.stream.getAudioTracks()[0]);

The above line, given in the console log will get the first audio track from your MediaStream. 

stream.addTrack(mediaStreamDest.stream.getAudioTracks()[0])

After that, it will mix up audio streams into one stream.

Hi Aboelfotoh, were you able to collect audio output? If yes could you please throw me some pointers how did you do it?