improvisational obbligato即兴伴奏
obbligato piano一部带钢琴协奏
obbligato o伴奏
general obbligato interface以及通用伴奏接口技术
Arias With Obbligato Instrumen唱片名
with piano obbligato钢琴助奏
ADJ（形容词） not to be omitted in performance 不可省略的
N（名词） an essential part in a score 重要乐章
with oboe obbligato