Using a pitch pipe is going to help ensure consistency.

使用定调管将有助于确保一致性。

Oh, also when Wonka wants the Oompa-Loompas and they don't appear just to sing, he uses a pitch pipe, which I thought was a cool flourish.

哦，还有当旺卡想要 Oompa-Loompas 并且它们看起来不只是为了唱歌时，他使用了音管，我认为这是一个很酷的技巧。