[Icecast] using Icecast source client as PulseAudio source

[Daniel Pocock]

There are many Icecast source clients[1] available now.

The Coolmic[2] app is particularly interesting because it can turn a
Android phone (e.g. SmartLav+ lapel mic[3]) into a wearable mic for
presenters.

Not everybody is keen to run Icecast though, some people may want to
mix-and-match the Icecast source clients like that with some other
broadcasting platform, Jitsi Meet[4], Zoom or whatever.

Is there any documented way to make the Icecast source client appear as
a source in PulseAudio so that any arbitrary application can use the
sound feed as if it was a local microphone?  For example, has anybody
tried to do this with PulseAudio module-pipe-source[5] or
module-tunnel-source[6]?

We can already do stuff like this with video, for example, using the
v4l2loopback kernel module with gstreamer.  I provided a very trivial[7]
script for that and it would be interesting to have a parallel example
for audio.

Regards,

Daniel


1. https://icecast.org/apps/
2. https://coolmic.net/
3. https://www.rode.com/microphones/smartlav-plus
4. https://meet.jit.si
5.
https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/Modules/#module-pipe-source
6.
https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/Modules/#module-tunnel-source-new
7. https://gitlab.com/freertc/gstreamer-chroma-key