The question Isn't it obvious the pitch value alphabet language of music is Chomsky regular? seems like a valid and potentially useful music theory question. It asks about whether music can be modeled in a particular mathematical/linguistic way, which bears directly on subjects like music cognition and computer-based music creation and recognition. These general areas have been the subject of significant music theory study for at least a decade, and going back to at least to the 1940s.
It is closely related to In what language-level in Chomsky's hierarchy would the chord-progressions of classical music be categorized?, which received 12 upvotes to only one downvote, plus nine answers including one for 8 upvotes, one for six, and one that received a bounty.
IMO, the question should be reopened.