Cannot access Boot Camp partition after OS X reinstall
Neither of the suggested proposals is advisable. If you erase and reinstall Windows all the music will be lost. Creating a second bootable disk is a complex and error-prone task.

If the Windows volume really still exists you can access it in read-only mode and save your music to the OS X volume by default. If you also need write access install an appropriate tool like NTFS for Mac 14 or a free tool like NTFS-3G for Mac OS X.

You may also salvage the bootability of the Windows partition by adding appropriate MBR entries. Check for several questions and answers here at apple.stackexchange solving this issue.