set to music vs music

set to music is not a noun while music is a noun.

Word	Noun	Adjective	Verb	Adverb
set to music	No	No	Yes	No
music	Yes	No	No	No

set to music (noun)	music (noun)
	musical activity (singing or whistling etc.)
	punishment for one's actions
	any agreeable (pleasing and harmonious) sounds
	(music) the sounds produced by singers or musical instruments (or reproductions of such sounds)
	an artistic form of auditory communication incorporating instrumental or vocal tones in a structured and continuous manner

set to music (verb)	music (verb)
write (music) for (a text)