We need an audioconvert, ... and a GStreamer patch.
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5324 is the gst patch. Audio clips quite a bit at runtime in WebKit, so further debugging is needed...
Pull request: https://github.com/WebKit/WebKit/pull/18489
Committed 268767@main (42fe82e16280): <https://commits.webkit.org/268767@main> Reviewed commits have been landed. Closing PR #18489 and removing active labels.
<rdar://problem/116394059>