I started digging into the SoundTouch library and confirmed my suspicion. https://hg.mozilla.org/mozilla- central/file/tip/media/libsoundtouch/src/TDStretch.cpp#l637
Author says it's implemented using "WSOLA-like method". Waveform- similarity-based synchronized overlap-add. Maybe based on this paper from 1993? https://www.semanticscholar.org/paper/An-overlap-add- technique-based-on-waveform-(WSOLA)-Verhelst- Roelands/d94abd77e52a56c425e4b86e6c7d692583ea406d Perhaps it doesn't scale well past 2x. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1654480 Title: HTML5 sound choppy when played at 4x To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/1654480/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
