Dastgāh-e Homayun (Persian: دستگاه همايون; Azerbaijani: Hümayun) is a musical modal system in traditional mugham music and one of the seven dastgāhs of Persian Music (Persian classical music is organized into seven dastgāhs and five Āvāzes; however, from a purely technical point of view, one can consider them as an ensemble of 12 dastgāhs).
This is the seventh mode and consists of 0.5+1.5+0.5 tone, which is created in amalgamation of two tetra-chords with the fourth method.
It creates deeply mournful feelings at listener.
[1] Subgenres of Humayun are: Bardasht, Humayun, Baxtiyari, Feili, Boyuk Masnavi, Movlavi, Shushtar, Tarkib, Uzzal or Bidad, Kichik Masnavi.
[2] This article about the culture of Iran is a stub.