Stolen answer from grawity in SuperUsers:
The easy way: Run
paprefs, go to Network Server and check Enable
network access to local sound devices.
You need to install it using
sudo apt-get install paprefs
Whenever you SSH with X11 forwarding enabled, PulseAudio programs use
X11 to discover your sound server (use
PULSE_SERVER to see for yourself). Just tell PulseAudio to listen for
network connections (
paprefs as described above), and all X11
programs will be able to use it.
(Other users will not have access to your sound server, unless you
allow it yourself in
paprefs. The authentication data is carried
over in the X11
PULSE_COOKIE property, or you can copy
Note however, that the PulseAudio stream is not encrypted this way, so
it is okay for use at home, but not over the Internet.
The slightly more complicated way: Enable network access as above, but
tunnel PulseAudio over SSH TCP forwarding. Use
discover your PulseAudio port (usually 4713), connect with
24713:localhost:4713, then run
PULSE_SERVER="tcp:localhost:24713". This will be slightly slower due
to SSH overhead, but is safe to use over the Internet.