Ever since the first post beta update of Minecraft, the background music has not played.
*I play about 3 hours a day, background music doesn't start even once.
*I have all other sounds, including discs.
*I've been using Pandora to kill the silence (though Depeche Mode keeps telling me to enjoy it).
*Deleting the bin, reinstalling Minecraft, or just reinstalling the music file does jack squat.
*My computer is only a few months old & said that I already had the best driver software for my sound.
*The music in game options is cranked up 100%.
I primarily play on a map I created on 1.5 beta that I converted into Creative, & I wonder if somehow the age of the map or the conversion somehow effected the music. I haven't really heard music in survival on new maps, but the new biomes don't really inspire me to want to build anything, so I never stay in them for more than half an hour.
Sounds strange. I really wouldn't know what this is. If you have completely deleted everything Minecraft related and reinstalled various times then I don't know what it could be, and it is probably something related to your computer.