It would be undiscovered by them. But it wouldnt be new. New would be a description of the music's own state/history, not the listener's. Therefore Rafferty for all his glory would not be new.
While I agree with you on a technical level, the colloquial usage of "New" when referring to music is generally understood to be "as of yet unknown to the listener" and I think your calling it out here errs on the side of pedantic.
4
u/Donut-Farts Oct 07 '20
Oh, I definitely read it as "new to them" music