noun
relative pitch
The ability to identify or produce a musical note by comparing it to a reference note, as opposed to absolute pitch (絶対音感).
See also: 絶対音感
相対音感があれば、基準の音から他の音を聞き分けられる。
With relative pitch, you can distinguish other notes from a reference note.
彼は絶対音感はないが、相対音感は優れている。
He doesn't have absolute pitch, but his relative pitch is excellent.