自然语言、语音和声音将是不断变化的用户界面的基础，我们必须进行投资。

Natural language, speech, and voice are going to be fundamental to the changing UI, and we have to invest.

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现在把我们的注意力放到低声部上，尽量唱出低声部，如果在唱的过程中我们觉得自己的声音没有变化，那和声就很有可能没有改变。

So we'll focus on the bass and we'll try to sing the bass, and if we find that in singing the bass our voice is not changing, probably the harmony hasn't changed.

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根据其他系统元素修改音量级别会是添加信息的直观方法，而无需添加通知或和声变化。

Modifying the volume level according to other system factors could be an intuitive way to add information without adding notes or harmonial changes.

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We want to figure out if the harmony is changing, and if it is changing whether it's changing at a regular or irregular rate.

一是判断和声是否发生了变化，二是如果发生了变化，和声的变化频率是规则还是不规则的。

耶鲁公开课 - 聆听音乐课程节选

By regular rate we mean that the amount of time that each chord holds is exactly the same; every chord holds for the same length of time.

如果变化频率规则，那么和声中每个和弦持续的时间长度是完全相同的;,每个和弦都持续同样长的时间。

耶鲁公开课 - 聆听音乐课程节选

So what's happened to the rate of harmonic change here?

所以说这里的和声变化率是怎样的？

耶鲁公开课 - 聆听音乐课程节选