It’s not completely relevant to Lc0, but many people who follow CCCC wonder how to disable sound.
If you use Chrome browser, you can mute the tab by right’s clicking tab’s
header and choosing “mute site” from there. :)
The same also works for Firefox.
Possibly in other browsers too.
(In Chrome, that’s F12 and then Console tab).
UPD: Also variant which shows 50-move clock.
UPD2: Variant which does that even better (also resets on captures, not only pawn moves)