2 sentences for 音调 (yīn​diào)

1. 这架钢琴的音调不准。

   zhè jià gāng​qín de yīn​diào bù zhǔn.

   This piano is out of tune.

   Source: Dong Chinese Dictionary

2. 他说话的音调听起来很严肃。

   tā shuō​huà de yīn​diào tīng qi​lai hěn yán​sù.

   The tone of his voice sounds very serious.

   Source: Dong Chinese Dictionary