Seconding this, just use mumble. It’s self-hosted free and open source software, easy on resources, provides very low latency, and it’s very stable and reliable.
The client might look a little dated but I still love it. I don’t care for stupid electron apps, which every modern application seems to be.
Honestly, the best solution to 1 may be to simply deploy mumble in addition to matrix (or other chat apps).
Seconding this, just use mumble. It’s self-hosted free and open source software, easy on resources, provides very low latency, and it’s very stable and reliable.
The client might look a little dated but I still love it. I don’t care for stupid electron apps, which every modern application seems to be.