There's a slight chance some of it may be recoverable with special recovery software, but that depends on wether new data has been physically placed in spots on your HD where there used to be data containing music-files. Bottom line is, your music files are only completely lost if they have been overwritten by other/new files.
If you want to try and recover some of you music, your best shot is to not install new software, download torrents, or any action that put's new data on your HD to prevent your missing music-files being overwritten by new data until you've you can give recovery a go.
You could give a programm such as "Recover My Files" a go. This prog will analyze your HD, and will try to figure out what data is recoverable, even after you did a format and re-installed windows and shit.
If you wanna give this a try but feel you could do with some xtra assistance, feel free to drop me PM or look me up on MSN or something
