What is rhythm changes?

Rhythm changes is a jazz harmony progression consisting of four basic chords, each repeated for two measures. The chords are:

| Chord | Function |

|---|---|

| G⁷ | Dominant |

| C⁷ | Subdominant |

| D⁷ | Dominant |

| G⁷ | Tonic |

Rhythm changes is often used as a basis for improvisation, and has been featured in many jazz standards, including "Anthropology", "Scrapple from the Apple", "Donna Lee", and "Giant Steps".

The chord progression can also be notated as follows:

```

G<sup>7</sup> C<sup>7</sup> D<sup>7</sup> G<sup>7</sup>

```