• some Linux distribution (I am doing this on Debian Testing, but it should work anywhere, where PulseAudio is running)
  • PulseAudio
  • pavucontrol
    • you can probably do the same without a GUI or the audio settings of your desktop environment, but pavucontrol gives a nice overview
    • you can install it with sudo apt install pavucontrol on Debian/Ubuntu
  • OBS (or any other program using the audio channel)

Sources and more Information

This guide is mostly an extended summary of