中音谱号

例句：

1. 1. The violinist played a beautiful piece for the audience with the middle tuning.
   小提琴家用中音调演奏了一首美妙的曲子给观众听。
2. 2. During the concert, the conductor used the middle tuning to guide the orchestra.
   音乐会上，指挥使用中音调来引导管弦乐队。
3. 3. The composer chose the middle tuning because it was easier for him to play.
   作曲家选择中音调是因为对他来说更容易演奏。