Split audio from programs in pulseaudio

Split audio guide.md

First copy default.pa to ~/.pulse if you do not have it there already

mkdir ~/.pulse
cp /etc/pulse/default.pa ~/.pulse/

Open ~/.pulse/default.pa in a text editor and add this for each audio channel you want

# Make a dummy sink for split audio
load-module module-null-sink sink_name=sinkname
update-sink-proplist sinkname device.description="description Audio"
update-source-proplist sinkname.monitor device.description='Monitor of description Audio'
load-module module-loopback source=sinkname.monitor sink=devicename latency_msec=1

Replace sinkname with a unique name for your audio channel, and update "description"
to give a descriptive name to the sink.

Replace devicename with your audio speaker/headphones device name, you can find those with the command below

pacmd list-sinks | grep -e 'index:' -e 'name:'

the * indicates which device you currently are listening to.

Once you are done, restart pulseaudio with

pulseaudio --kill

If pulse does not auto start again just run pulseaudio --start

Then you can find your new audio channels in pavucontrol and you just change programs that play audio to play it to your new audio channel.