The unused music thing was fake. The original poster on Reddit said so. [www(.) reddit(.)com/r/Undertale/comments/5t94a7/about_the_unused_music_thing/]

saveloadreset:

Wow. This is part of the reason you can’t trust anyone in this fandom, sometimes. I thought we were past the point where we would lie about stuff. But apparently not.

 At least he confessed, I suppose, but the damage is kind already done.

Thanks for letting me know. I’ll be deleting my reblogs and posts on the matter.