二に部ぶ合がっ唱しょう

noun

two-part chorus; vocal duet

Refers to a choral piece or performance for two voice parts, typically soprano and alto or similar. Can also describe the act of singing in two parts.

• 音おん楽がくの授じゅ業ぎょうで二に部ぶ合がっ唱しょうを練れん習しゅうした。