I need to create a virtual output in PulseAudio so as to be able to capture and stream audio from a specific source.

I know that it's possible to re-route a specific application's output to a given output device like so, using pavucontrol:

I'm looking to add another virtual output to the "Output Devices":

Is this possible, and if so, how can I do it?

sudo modprobe snd_aloop

Adds a loopback device to ALSA, which appears in the PulseAudio Volume Control. Redirect your stream there, and presto!

Not sure how to add multiple loopback devices.


You can add a sink with

pacmd load-module module-null-sink sink_name=MySink
pacmd update-sink-proplist MySink device.description=MySink

You can add a loopback device with the command

pacmd load-module module-loopback sink=MySink
  • For input it appears there is a pacmd load-module module-null-source as well, though it has an input level reading that spikes around. – ThorSummoner Feb 20 '18 at 23:06

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