The moderator is able to mute the mikes guests.
Guests can adjust incoming volume of individual participants. The way to adjust the incoming volume of all participants is the system volume. Well and good if there’s no need to listen to anything else while on Jitsi - which there sometimes is.
Would it be difficult to allow guests to mute (or adjust) the incoming volume of all participants?
This would also make streaming multiple devices and windows from a single machine more convenient than having to individually lower the incoming volume of each participant in all but one of the Jitsi instances.