| Rast | |
| lower step interval (D − Ed) | upper step interval (Ed − F) |
| 7 kuma | 6 kuma |
| bayati | |
| lower step interval (D − Ed) | upper step interval (Ed − F) |
| 6 kuma | 7 kuma |
| sikah | |
| lower step interval (D − Ed) | upper step interval (Ed − F) |
| 7 kuma | 6 kuma |
| nahawand | |
| lower step interval (D − Eb) | upper step interval (Eb − F) |
| 4 kuma | 9 kuma |
| kurd | |
| lower step interval (D − Eb) | upper step interval (Eb − F) |
| 4 kuma | 9 kuma |
| ajam | |
|
| upper step interval (E − F) |
| 9 kuma | 4 kuma |