Rast pitch class set
(Redirected from Rast tetrachord)
The Rast pitch class set is a set of scales that are named after the Rast makam. For Rast, there is the Rast tetrachord and Rast pentachord.
It is used as a Çeşni in many makams.
Rast tetrachord and pentachord in 53-TET
[edit]The intervals of the Rast tetrachord and Rast pentachord within 53 Tone Equal Temperament are given in the table:
| Pentachord | Tetrachord | Note order | Step to next note (Number of steps) | Note name starting from Rast[1] |
|---|---|---|---|---|
| Rast pentachord | Rast tetrachord | 1 | T (9) | Rast |
| 2 | K (8) | Dügâh | ||
| 3 | S (5) | Segâh | ||
| 4 | T (9) (Only for pentachord) | Çârgâh | ||
| - | 5 | - | Neva |
Makams that use the Rast pentachord or Rast tetrachord
[edit]| Name of Makam | Lower Çeşni | Higher Çeşni | Notes | |
|---|---|---|---|---|
| Rast Ascending[2] | Rast pentachord | Rast tetrachord | ||
| Acemli Rast (Same as Rast Descending) | Rast pentachord | Buselik tetrachord | ||
| Basit Suzinak[3] | Rast pentachord | Hicaz tetrachord | ||
| Nikriz | Nikriz pentachord | Rast tetrachord | Buselik tetrachord | |