noun
In music, refers to the alto voice range or part. Often used in choral or vocal contexts.
See also: アルト
合唱団で中高音を担当しています。
I sing the alto part in the choir.
アルト is the common loanword for 'alto' in everyday music contexts. 中高音 is a more technical, kanji-based term used in formal or classical settings.
Compound of 中 (middle), 高 (high), and 音 (sound), literally 'middle-high sound', referring to the alto vocal range.