I had the same problem with Mint and fooled around with all the settings...finally discovered that I hadn't downloaded and installed a sound mixer. Which I did (can't remember the name of it offhand, it was a simple text based thing where you move X's to change slider settings) and Behold, music poured forth.
Did the same with Ubuntu on another machine. Do these not get installed by default? I dunno.
If this makes no sense write me & I'll try to figure out what I did. vandamme at juno dot com.