Barrier: [feature request] Share audio device

At least for linux, this already exists (at least, for outputs to my knowledge) via a pulseaudio module.

I feel like this would be better suited as it's own application.

A few links for those who wonder how it can be done, particularly between windows and linux (note, I haven't _yet_ tried any of these):

first some relevant stack exchange questions: superuser 1 superuser 2 sound.stackexchange

... and some solutions (not tested by me, as noted above):

• win7 apparently has a Play To feature that can broadcast to things supporting DLNA
• pulseaudio apparently can be built for windows, or at least could in the XP era. It's unclear to me whether this works with anything newer.
• edcast/altacast + icecast (though edcast/altacast appear to be outdated - screenshots from winxp, at best)

I feel like this would be better suited as it's own application.

@AdrianKoshka sure, though Barrier could make this less painful by documenting what's needed and/or helping the user configure it. :)

Upon reflection, I still feel this is incredibly out of scope for barrier and would only add unneeded complexity.

Just wanted to add a method that worked for me with barrier using ffmpeg. This will share desktop audio only (not microphone input).

In this example, the client is Ubuntu, and the server is Windows. ffmpeg will need to be installed on both. Other scenarios will need a different command and understanding of ffmpeg.

On the "client", run the ffmpeg command:

ffmpeg -re -f alsa -ac 2 -i default -f rtp rtp://server:1234

Where server is your barrier server IP address. This will stream desktop audio to the specified address

(If you use pulse instead of alsa, replace -f alsa with -f pulse )

It will output something like:

SDP:
v=0
o=- 0 0 IN IP4 127.0.0.1
s=No Name
c=IN IP4 192.168.1.82
t=0 0
a=tool:libavformat 58.21.100
m=audio 1234 RTP/AVP 97
b=AS:768
a=rtpmap:97 PCMU/48000/2

In my example the server is 192.168.1.82

On the server machine (192.168.1.82), copy the SDP text above into a file sdp_file and run the ffplay command:

./ffplay -protocol_whitelist 'rtp,file,udp' .\sdp_file

Enjoy streamed low-latency audio.

I could see this potentially working inside barrier in the future, so here's a little inspiration and direction in case anyone has time for a fork.