What is the Arabic music rotating system?

The characteristics of traditional music in West Asia and North Africa: (1) the dominant position of Persian-Arabic music system and its musical characteristics: the use of difference sounds and the conditional cavity of music sounds; Markham and Dast Gacci's spinning system: equal rhythm and uneven rhythm coexist; The texture thinking mode is mainly horizontal; Similarities in the use of musical instruments. (2) Diversity of folk music.