I think VLC can record and stream audio. I’ve never used this feature, though I did a quick search and it appears to be a feature.
Larix Broadcaster?
https://softvelum.com/larix/
Does this backend have to be remote? Why not a Bluetooth (or WiFi?) mic or similar?
Pipewire and a pinephone, librem etc?
I think VLC can record and stream audio. I’ve never used this feature, though I did a quick search and it appears to be a feature.