In music theory, the descending tetrachord is a series of four notes from a scale, or tetrachord, arranged in order from highest to lowest, or descending order. For example, -♭
-♭
-
, as created by the Andalusian cadence. The descending tetrachord may fill a perfect fourth or a chromatic fourth.
![](https://cdn.statically.io/img/upload.wikimedia.org/wikipedia/commons/thumb/d/d9/Phrygian_tetrachord.png/300px-Phrygian_tetrachord.png)
![scale degree 8](https://cdn.statically.io/img/upload.wikimedia.org/wikipedia/commons/thumb/e/eb/Scale_deg_8.svg/8px-Scale_deg_8.svg.png)
![scale degree 7](https://cdn.statically.io/img/upload.wikimedia.org/wikipedia/commons/thumb/6/65/Scale_deg_7.svg/8px-Scale_deg_7.svg.png)
![scale degree 6](https://cdn.statically.io/img/upload.wikimedia.org/wikipedia/commons/thumb/3/32/Scale_deg_6.svg/8px-Scale_deg_6.svg.png)
![scale degree 5](https://cdn.statically.io/img/upload.wikimedia.org/wikipedia/commons/thumb/4/4e/Scale_deg_5.svg/8px-Scale_deg_5.svg.png)
![](https://cdn.statically.io/img/upload.wikimedia.org/wikipedia/commons/thumb/6/61/Phrygian_half_cadence_in_C.png/300px-Phrygian_half_cadence_in_C.png)
![scale degree 8](https://cdn.statically.io/img/upload.wikimedia.org/wikipedia/commons/thumb/e/eb/Scale_deg_8.svg/8px-Scale_deg_8.svg.png)
![scale degree 7](https://cdn.statically.io/img/upload.wikimedia.org/wikipedia/commons/thumb/6/65/Scale_deg_7.svg/8px-Scale_deg_7.svg.png)
![scale degree 6](https://cdn.statically.io/img/upload.wikimedia.org/wikipedia/commons/thumb/3/32/Scale_deg_6.svg/8px-Scale_deg_6.svg.png)
![scale degree 5](https://cdn.statically.io/img/upload.wikimedia.org/wikipedia/commons/thumb/4/4e/Scale_deg_5.svg/8px-Scale_deg_5.svg.png)
Phrygian half cadence: i-v6-iv6-V in c minor (bassline: c -b♭-a♭-g) .
See also
editSources
editExternal links
edit- "Tetrachord", Britannica.com.