J'aurais plutôt dû dire 7 dastgah

pour les intéressés:
ranian classical music relies on improvisation and composition and is based on a series of modal scales and tunes which must be memorized. Apprentices and masters (ostad) have a traditional relationship which has declined during the 20th century as music education moved to universities and conservatories. A repertoire of more than two hundred short melodic movements called gusheh, which are classified into twelve dastgahs. Each gusheh and dastgah has an individual name. A typical performance consists of a pishdaramad (pre-introduction or more appropriately prelude), daramad (introduction), avaz (improvised rhythmic-free singing), tasnif (rhythmic accompanied by singing), Chaharmezrab (rhythmic music but rhythmic-free or no singing), reng (closing rhythmic). A performance forms a sort of suite. The gusheh and daramad are non-metric and rhythm-free, while the tasnif, pishdaramad, reng and chaharmezrab are rhythmic. Unconventionally, these parts may be varied or omitted. Towards the end of the Safavid Empire (1502-1736), more complex movements in 10, 14, and 16 beats stopped being performed. In fact, in the early stages of the Qajar Dynasty, the usul (rhythmic cycles) were replaced by a meter based on the ghazal and the maqam system of classification was altered to the radif system which is used to this day. Today, rhythmic pieces are performed in beats of 2 to 7 with some exceptions
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