In the 20th century, the first four notes were used by other musicians to make different types of music like hiphop and rock and roll.

在20世纪，其他音乐家会使用前四个音符创作不同类型的音乐，如说唱乐和摇滚乐。

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

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。

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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.

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。

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On the other hand, untrained musicians can make music too.

ECONOMIST: What is music for?

It's the musicians themselves who make the music resonate, while recordings simply catch the ephemera.

NPR: Nicholas Payton: A Different Kind of Blue

The scanners show that when trained musicians make or listen to music they use (among others areas) approximately the same parts of the brain as those they employ in conversation.

ECONOMIST: What is music for?