Bug 226240

Summary:	Glitches in AudioWorklet playback
Product:	WebKit	Reporter:	Peter Salomonsen <pjsalomonsen>
Component:	Web Audio	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Major	CC:	cdumez, pjsalomonsen, tobias.hegemann, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	Safari Technology Preview
Hardware:	iPhone / iPad
OS:	iOS 14

Description Peter Salomonsen 2021-05-25 13:41:00 PDT

After the update with AudioWorklet support there are glitches in the audio in all of the links below when playing on my Iphone XR:

https://petersalomonsen.com/nftmusic/2
https://petersalomonsen.com/nftmusic/3

The two links above has a polyfill and plays nicely if AudioWorklet is turned off.

The link below has no polyfill, relies only on AudioWorklet but has glitches even on my Macbook Air M1:

https://psalomo.near.page/nftparts1/index.html

Plays without problems in Chrome/Firefox on the same Macbooc Air M1.

Comment 1 Radar WebKit Bug Importer 2021-06-01 13:41:23 PDT

<rdar://problem/78730612>

Comment 2 Tobias Hegemann 2023-02-06 03:22:08 PST

This might be an duplicate of https://bugs.webkit.org/show_bug.cgi?id=251091

However, I created a simple and minified test for this issue as well:
https://delude88.github.io/ios-audioworklet-sample-rate/

Each time any AudioWorklet is used on iOS it creates glitches, that still remain and affects the whole audio context - until the it is recreated.