Sorry to hijack — does Matrix have support for voice channels now? I know it has support for voice calls, but I’d like to just join a designated voice channel and allow other members to join as they please.
I've got my instance of matrix working with voice calls. It's not built in, but it's just another service in my compose file alongside the bridges I use to have my unified chat app.
I'm using coturn and it just works when doing voice and video calls with federated users.
I think I've seen people using jitsi as well, so it seems there are many options available