Something is said despite innovations. So something not original as it is music.
IN this case derivative or trite.

A,B

Sentence suggests that most of the Music piece in late 70's are not very innovative except few

so Derivative (not original) and Trite(repeated too often) go well with the sentence.

Ans- (A,B)

Exception --> few innovators
This implies the rest of the work is insipid, nothing great

AB works here

OE


The blank is supposed to describe the music, “despite the notable exception of a few innovators,” so the blank must be something that is the opposite of innovative. “Derivative” means based on another source and “trite” means overused and lacking in freshness, making these two the correct answers. “Visionary” and “inspired” are tempting choices because they both can mean innovative, but the sentence calls for something that is not innovative. “Enigmatic” means hard to understand or mysterious, and although some might consider the music of the ’70s to be “enigmatic,” this word, along with “cerebral,” does not fit with the idea of not being innovative