Dastgāh-e Chahārgāh (Persian: دستگاه چهارگاه; Azerbaijani: Çahargah) is a musical modal system in traditional mugham music and one of the seven Dastgāhs of Persian Music.
Classically, Persian Music is organized into seven Dastgāhs and five Āvāzes, however from a merely technical point of view, one can consider them as an ensemble of 12 Dastgāhs.
This is the fifth and the longest mode according to the amount of sounds.
Chahargah mode is represented in two kinds in Uzeyir Hajibeyov’s composition.
Subgenres of Chahargah are: Bardasht, Maye, Bali-Kabutar, Djovhari, Basta-Nigar, Hisar, Mualif, Garra, Mukhalif, Ouj Mukhalif, Maghlub, Mansuriyya, Uzzal.