1. It is difficult to tone in the exact pitch.
很难调准准确的音高。

2. We need to tone in the lighting for the photoshoot.
我们需要为拍摄调整灯光的色调。

A: Can we tone in the volume slightly?
A：我们能稍微调一下音量吗？

B: I will try to tone in the pitch immediately.
B：我会立即尝试调节音高。

1) 调整音调

2) 调节语气

3) 改变色调

1. 调节音调或语气

e.g.The technician tried to tone in the signal.
技术人员试图调节信号的音调。

verb phrase

1. to adjust the tone, pitch, or character of something.