Bug 173826 – Heavily distorted audio when calling createMediaStreamSource multiple times

• Status: NEW
• Component: Web Audio

[Andrew Morris]

JSBin demo:
https://output.jsbin.com/noyepif

Summary:
  // Analyse the audio
  const streamSrc1 = audioCtx.createMediaStreamSource(stream);
  const analyser = audioCtx.createAnalyser();
  streamSrc1.connect(analyser);
  
  // Play the audio
  const streamSrc2 = audioCtx.createMediaStreamSource(stream);
  streamSrc2.connect(audioCtx.destination);

One solution is to use the same MediaStreamSource instead of creating multiple, but it doesn't seem like this should be necessary. Chrome and Firefox handle this without issue. This can occur for example when these operations are done in separate parts of the application.

[Radar WebKit Bug Importer]

<rdar://problem/32981074>