[LAU] How to combine microphone audio and music from application to pipe to video conference

david gnome at hawaii.rr.com
Sat May 16 07:20:12 CEST 2020

Hi, Samir!

On 5/15/20 5:40 PM, Samir Parikh wrote:
> Hello,
> I am trying to combine the audio from my microphone (either built in
> microphone from my laptop or bluetooth headset) with music playing
> from Rhythmbox Music Player running on Ubuntu 16.04 and pipe that as
> the audio input to video conference services such as Jitsi.

My experience with Jitsi is that its audio input is limited to two 
sources: Whatever microphone you have connected to your computer, and 
your chosen YouTube URL (if you use Jitsi's option to stream a YouTube 
URL). It lets you stream a YouTube URL, but that seems to take over the 
Jitsi screen. I think at that point maybe you could talk in your 
microphone and have it audible over the YouTube stream... but I don't 
know, I haven't tried it.

I tried to find a way to stream just audio from my music library here 
(mplayer playing through JACK) but couldn't find a way to get Jitsi to 
take JACK as an input. The only options I saw were hardware ones.

I don't use Pulseaudio, maybe it could be set up to get around Jitsi's 
idea of "hardware"?

> I don't know much about Linux audio internals and wasn't sure how to
> do this.  Can I do this completely via the operating system using
> Pulse Audio?  Do I need to do something with Jack?  Or do I need
> specialized software such as OBS, Ardour or Reaper?
> Any help or suggestions on pointing me in the right direction or how
> to get started would be greatly appreciated.  I'm hoping that I can do
> this completely through software without external hardware such as a
> mixer or something.
Maybe play your music to a channel connected to an external mixer, 
connect your regular microphone to a different channel on the mixer, 
then connect that output to a microphone in on your compute?

I don't know, just guessing. Hope it helps!

David W. Jones
gnome at hawaii.rr.com
authenticity, honesty, community
"My password is the last 8 digits of π."

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