I made a test Flatpak build of AudioRelay. Please take note that this is unofficial and I’m not connected in any way with the developer.
To test it:
flatpak install --user flathub org.flatpak.Builder
git clone --branch=audiorelay https://github.com/IverCoder/flathub.git
cd flathub
flatpak run org.flatpak.Builder --user --install --force-clean build-dir net.audiorelay.AudioRelay.yml
This is not yet stable. For one thing, it just broadcasts a shrieking version of whatever your mic is capturing at that time, which in my experience also occurs on the .tar.gz version.
Please discuss about my build on this thread so we don’t clutter this one.