this may be a issue regarding your sound drivers or if you are playing the music through a cd drive - the cd drivers themselves - try this if you have windows xp
right click on my computer > click properties
select hardware then device manager
click on the plus next to sound video and game controllers
look for something like realteq 97 or a sound chip
right click on it then uninstall
now goto the cd/dvd rom drives and do the same uninstall the cd drive in question
now go back to the top and click on the plus next to the ata/atapti controllers
now uninstall the one that says controllers - don't bother with the ones that say primary ide CHANNEL etc
Then restart when prompted
When windows restarts should say found new hardware and the eventually ask you to restart again
test your music
see if this helps