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