So we'll start it at pitch there and I'll give you two and then we'll sing "La" And we will exemplify monophonic texture.

那我们就从这个音高开始,我喊到二然后我们一起唱,啦,我们来演示一下单音织体

耶鲁公开课 - 聆听音乐课程节选

If we have to sing a different pitch, then probably the harmony has changed.

如果觉得自己需要变调，那么和声就很可能已经改变了。

耶鲁公开课 - 聆听音乐课程节选