Two choirs alternatively perform Veŝ Tavaré Na avaz (Transcription 5). The second group starts the avaz before the first group finishes it; consequently, two different voices coincide (Transcription 5, staves 2 and 5).

Mohsen Renani in the preface of his book entitled “The Political Economy of nuclear conflict; an introduction to traversing the civilizations” writes:

On occasion of the 8th anniversary of launching HarmonyTalk Online Journal on 6 April 2012, Reza Ziaei, master luthier and researcher on classical music instruments (violin family), announced that the first phase of the project to improve Qeychak has borne fruit. The new instrument would feature a bowl of ribs and the material used for the surface would be wooden. Carrying out the second phase of the project took more than 7 years engaging the new members of Reza Ziaei’s Workshop. In this phase, new researches were conducted from different aspects on the Qeychak and the modern versions of the instrument which were introduced previously by other instrument makers. The available versions of the instrument were studied in terms of their weak and strong technical features.

After watching Quentin Tarantino’s latest movie, The Hateful Eight, everyone was excited by its novel music besides the beautiful scenes of blood and guts.
The Hateful Eight is the first collaboration between the world-famous film music composer, Ennio Morricone, and Quentin Tarantino as a famous director.

Golnoush Khaleghi (1941-2021), a Washington-based Persian musician and the daughter of the contemporary Persian (Iranian) composer and theoretician Rouhollah Khaleghi (1906-1965) founded a musical center called RKAC to keep the name and the work of her father alive.

In 1990  an Austria-based Persian musician Khosro Soltani, in cooperation with Hossein Alizadeh, put out an album entitled, Ancient Call A New (Nobang-e Kohan). After many years, a few ancient Persian instruments such as Sorna, Karna, Naghareh,etc. have been used, instruments which have been left out of the circle of Persian classical musical instruments for centuries.

Despite the fact that Iranian folk music (regional music of Iran), like the Radif of Iranian traditional music, is monophonic and follows heterophony in principal, we experience polyphonic forms, albeit, majorly unconscious.

Gholam Hossein Banan was born in 1911 in Tehran. He was born in an affluent art-loving family who were Naser al-Din Shah Qajar (1848-1896)’s relative. The Qajar King was his mother’s uncle on her father’s side. He learnt his first lessons in music while his father sang Iranian avaz (improvised rhythmic-free singing), he then attended classes by the renowned Iranian composer, Morteza Neydavoud (1900-1990) along with his sisters; the composer is, therefore, considered as his first teacher. He then learnt Iranian avaz under the supervision of Mirza Taher Zia Resaee (Zia-o Zakerin) and Naser Seif in an oral manner.

In heterophonic variant, two performers perform a single melody simultaneously and change it. Performing and changing a single melody simultaneously by two performers leads to the coincidence of different voices.

Tehran Flute Choir was established in 1394 (late 2015) by Firouzeh Navai. Tehran Flute Choir, Iran’s first largest flute choir, recruited its members mostly from young talented flutists of Iranian Flute Association. Featuring piccolo, flute, alto flute and bass flute, Tehran Flute Choir, directed by Firouzeh Navai, premiered under the batons of Saeed Taghadosi on January 7-8, 2016 at Roudaki Hall in Tehran.