Dastgāh
Dastgāh (; Persian: دستگاه, Classical: [dastˈɡɑːh], Iran: [dæstˈɡɒː(h)]) is the standard musical system in Persian art music, standardised in the 19th century following the transition of Persian music from the Maqam modal system. A dastgāh consists of a collection of musical melodies, gushehs. In a song played in a given dastgah, a musician starts with an introductory gusheh, and then meanders through various different gushehs, evoking different moods. Many gushehs in a given dastgah are related to an equivalent musical mode in Western music. For example, most gushehs in Dastgāh-e Māhur correspond to the Ionian mode in the Major scale, whilst most gushehs in Dastgāh-e Shur correspond to the Phrygian mode.