如何修复某些网站(Firefox)上的音频乱码?

我在Ubuntu 20.04上,使用Firefox 76.0.1作为Web浏览器。

由于某些原因,某些网站上的音频会变成乱码,模糊,难以理解的混乱。并非在每个站点上都发生这种情况。我可以整天在YouTube上观看视频,但是Twitter上的任何视频都无法观看。系统音频-Clementine,Rhythmbox,Skype,VLC等-都可以。

For example, here is a recording of how this video sounds on my computer.

  • I've tried headphones, but it made no difference
  • I've run through every configuration within Sound Settings - none made a difference
  • I've tried Firefox in safe mode but the issue persists, so it's not my extensions
  • I've tried on another computer but the issue persists, so I don't think it's hardware-related
  • I've tried Chromium and the video sounds fine, so I think it must be a Firefox issue
  • I don't have any speech-dispatcher processes running (per this answer)
  • I've disabled media.webspeech.synth (per this answer)
  • Unlike a lot of similar issue reports (e.g., this one) this issue does not go away with time and happens every single time for certain sites (but never for others)
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