This should work conceptually on any Linux OS with PulseAudio but these particular instructions are for Ubuntu.
There are two major reasons for using simultaneous output. The first is self-evident - we can output to say a bluetooth
headset and wired headphones at the same time to enable two people to watch a movie with headphones on a single computer.
The second reason is a sort of a convenience for setup. We know the simultaneous sink name so the default.pa config
would work without modification so long as simultaneous output is enabled. If we were to set this up without that,
we'd have to customize the config with our specific device sink name. That's totally doable but personally I always
setup simultaneous output. That's why I haven't described the alternative in this gist.
