If you add new music files/edit your after rebuilding the VOX files it could go the wrong way.
Maybe you should make an empty file named music.vox (or whatever it needs to be called) and rebuild the vox files. Maybe they'll overwrite the empty file and solve your problem.
Maybe you should make an empty file named music.vox (or whatever it needs to be called) and rebuild the vox files. Maybe they'll overwrite the empty file and solve your problem.