noun
standard tones; Chinese musical pitch system
Refers to the classical Chinese system of twelve pitches (律) and six yang/odd pitches (呂), used in ancient court music and theory. Highly domain-specific; not used in everyday Japanese.
雅楽の理論では、律呂は音階の基本となる概念である。
In gagaku theory, ritsuryo is a fundamental concept for the musical scale.
中国の古代音楽では、律呂によって調律が定められていた。
In ancient Chinese music, tuning was determined by the ritsuryo system.