Look into mumble. It’s NOT a discord replacement but does provide a good quality, low latency, OSS voice chat. Mumble + Signal group chat is what my friends and I use for gaming. Seems to work well.

https://www.mumble.info/

Tip: Turn on text-to-speech to get narrated announcements when users join channels. Also works for text chat shenanigans. 🤣

IKR?? I feel personally targeted by this… And I’m OK with it.

^^ Source: trust me bro