爵士乐手不会按照固定的乐谱一个音符一个音符地演奏，而是在演出的时候自编旋律及变化和弦。

Jazz musicians do not follow a set piece of music note by note, but make up melodies and chord changes as they play.

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流行音乐中也存在着多种多样的和声手法，我们从常用变化和弦的运用方面作一些简单的归纳。

There are also variety of harmony methods in popular music. We come to some simple concludes on the application of changing chord which is usually used.

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其中最重要的一种是即兴演出。爵士乐手不会按照固定的乐谱一个音符一个音符地演奏，而是在演出的时候自编旋律及变化和弦。

The most important of these is improvisation. 1 Jazz musicians do not follow a set piece of music note by note, but make up melodies and chord changes as they play.

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If so,how many chords are involved in this chord change and are they changing at a regular or irregular rate?

是否有和弦的转变，这次和弦转变一共用了多少和弦,他们的变化率是规则还是不规则的？

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They're these building blocks that support the melody and they have to change for that melody to be consonant all the time.

这些和弦是旋律的基础,和弦的变化必须和旋律保持协调一致

耶鲁公开课 - 聆听音乐课程节选

We're just going to watch and listen to--maybe even sing along with--the bass as he changes chords.

我们来听听看看，也可以跟着一起唱，看看低音是怎么与和弦一起变化的。

耶鲁公开课 - 聆听音乐课程节选