Thanks for all the responses folks (just joined properly, that was me waffling about codec latency and mesh networks above).

Looks like the latency issue is pretty fundamental. I think we'll have to revert to solos, which is very much against our grain as shanty singers! I'm wondering if we mute everyone except the leader, people could at least sing along even if they can't hear the rest of the group. We'll try it tonight!

Best wishes

Paul Clark
Falmouth Shout, UK