[Snow0]

When a server has sing-along it causes lag. I'm guessing that each audio "packet" from each singer is broadcast to everyone on the server. So if there are 10 singers and 24 people on the server then that's 10 packets to 24 players; or 240 "audio streams", which seems a likely cause of the lag.

Could this plugin be used to mix the 10 voices into one stream? I assume it'd have to buffer packets up (for 1/20 sec or 1 frame or something), then mix them and rebroadcast the single mixed packet. That would reduce the bandwidth by 10x (or however many singers there are).