Are these options available if you don’t have jigasi on your system?
I am also very interested in high quality audio the param referenced by paul-zwarts seems to be for jigasi (which I understand is for SIP). I will do some testing to see if those params can be applied to the jitsi-video-bridge and make a difference.
I definitely second a way to easily switch Voice vs Music mode in Jitsi.
There is a second line in the same configuration file which is in the XMPP section. It says it is “for control purposes” which I do not know what that is. I have played with that one as well, setting it to a higher value like referenced above. It seems to have an effect but I dont really have an idea how to test that.