So you need to listen to midi, eh ?
I've done this under Debian testing "sarge" at thet time

apt-get install timidity

Now get the timidity.cfg from Here. That's my home server, So it might be slow, down, Or anything. Check later if you can't get it now.

Under debian this file is placed in /etc/timidity/

Next, You'll need GUS patches, Get timidity.tar.gz from here.

After downloading:
cd /where/you/downloaded/the/file/
tar -zxvf timidity.tar.gz -C /usr/local/

now fire timidity:
timidity -in foo.mid

Enjoy ;-)