I just wish to share the Matlab (6.1) solution to doing sound over networked X:

>> sound(y);
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX.
Please contact your system administrator.
Add correct host key in /home/davyd/.ssh/known_hosts to get rid of this message.
Offending key in /home/davyd/.ssh/known_hosts:28
RSA host key for localhost has changed and you have requested strict checking.
Host key verification failed.
cat /tmp/au124313 | rsh localhost 'cat > /dev/audio' : Signal 127
>>

Unfortunately it seems that using SSH X-tunnelling confuses the poor thing (it is evidently reading the value from $DISPLAY).

This remains absolutely hilarious, if I didn't have the wrong key for localhost present, I never would have found out about this little gem.

Stephanie comes home tomorrow. Better tidy the house, throwout the pizza boxes, do the dishes, chase out the last of the party crashers, remove evidence of hookers and change the bedsheets...