>>364747428
Specifically we used https://sonobus.net/ , which does low-latency high-quality audio streaming. I can recommend it for playing music with people within ~1000km or so. Between the two of us we got about 40ms of latency, which isn't great but is equivalent to 13m of physical air, so like playing on opposite sides of a concert orchestra.

We also tried https://jamtaba-music-web-site.appspot.com , which works around the speed of light by delaying everything you transmit a full 4 bars (or other musical length), so you're playing in a sort of continuous round. It's kind of weird but is the best you can do if you're too far apart for sonobus.

To get the audio back into vrchat for listeners, any stream service will do, with voicemeeter to handle the audio routing. topaz.chat or self-hosting an RTSP server is best for listener latency, somewhere under a second.