Fereydoun Shahbazian, the renowned Iranian composer, passed away at the age of 82 due to respiratory illness in Tehran. His last significant activity was leading the National Orchestra before the appointment of Homayoun Rahimian.

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).

The National Instruments Orchestra of Iran performed its first concert amid much hope and anxiety on July 18, 2015. The Orchestra is founded by Roudaki Cultural and Arts Foundation which is a semi-private foundation in Iran. The Arts Director for the National Instruments Orchestra of Iran is cand the Orchestra Executive Director is Sadjad Pourghand.

The year 1396 (21 March 2017-20 March 2018) was the most sorrowful year for HarmonyTalk journal. One month after holding HarmonyTalk’s 13th establishment anniversary in Mohsen Ghanebasiri’s house in Tehran in April 2017, he untimely passed away. Mohsen Ghanebasiri was the prominent HarmonyTalk author.

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.

The collaboration between Mozart and Haydn blossomed during the late 18th century in Vienna, a city that served as the epicenter of musical innovation. Amidst this vibrant cultural milieu, the two composers developed a profound friendship that extended beyond mere professional admiration. This connection is reflected in the six string quartets dedicated by Mozart to Haydn, aptly known as the “Haydn Quartets.”

ehrouz Mohammadi, “Daf and its feasts in Ghaderieh’s Tekyeh” mentions that the outer thickness of arch where studs are located, [is] between one to one and a half centimeters (Mohammadi, 2001: 12). The thickness of arch should be gradually reduced from the installation place of rings to skin (Avazeh of Daf) to create a high volume, clear sound from Daf; also, the connection of arch to skin should not be less than one millimeter, because in this case the skin will be torn due to the sharpness of the wood (Mogharab Samadi, 2009: 79-78). The thickness of wood on the skin side is about two to three millimeters (Tohidi, 2002: 79).

With regard to each polyphonic form, only one specific and distinguished example is analyzed. These polyphonic forms are as follows:

In addition to the above-mentioned, polyphony can be also formed when a melody is performed by several singers in different ambiances or different sound registers according to their physiologic abilities. An example of this has been performed in rituals of Khanqah of Ghaderi darawish of Mahabad[i].

Khosrow Djafarzadeh, musicologist and architect, who was also one of the main authors of HarmonyTalk journal passed away on 15 July 2019.