Are these my darlings?

Kill your darlings, so goes a oft-repeated advice for writers. The cuter and cleverer the phrases/passages, the more ruthless we are to be.

But as I revise my novel, to re-balance the elements of music and mystery, per the suggestion of the editor, I find myself wondering if the passages (mostly music-related) I've removed are indeed my darlings or if I'm removing the very parts that make my story distinctive.