https://magenta.github.io/lofi-player/ is broken on macOS Big Sur unless you enable the Modern Web Audio experimental feature.
<rdar://problem/68198173>
Created attachment 407939 [details] Patch
Comment on attachment 407939 [details] Patch r=me once the bots are happy
Created attachment 407978 [details] Patch
Committed r266616: <https://trac.webkit.org/changeset/266616> All reviewed patches have been landed. Closing bug and clearing flags on attachment 407978 [details].
*** Bug 216814 has been marked as a duplicate of this bug. ***