Can you share if one would need a knowledge base of secular music or culture to understand it?
If you don't know a certain phrase, you can't understand it.
That phrase might fall into that. It's a technical phrase, though, not the name of a particular cultural artifact or creator.
(Also, you're expected to use Google.)
(Also, expect a different emoji-rebus signature once I've come up with one. This was probably too much of a stretch.)
(Edit: Added "or" - the omission was a mistake.)