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.”

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.

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].

The world of music has unparalleled respect for Bach. Bach is considered the spiritual father of classical music; Bach’s great position is due not only to his great achievements in the fields of harmony, counterpoint, and compositional sciences but also to his respect for and adherence to the artistic principles of classical music. In the history of classical music, it is recorded that Bach walked about fifty kilometers to listen to the music played by the great German organist Dieterich Buxtehude, and this is the path that every idealistic classical music student should walk.

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).

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.

Gholamreza Khan Minbashian taught courses such as organology, orchestration of military music and harmony based on the books which were translated from French into Persian with the help of Aliakbar Mozayyan-o-Dolleh (1846-1932).

Today, percussion instruments have such a high place in music that are an essential element of orchestras. This has attracted many people to this type of instrument with roots as old as the first humans. A historical study of music, shows that humans used the sound of these instruments to defend themselves against wild animals and, over time, for alerting each other, signaling their readiness and encouraging people for war, ritual ceremonies, dances, etc. in a manner that is still clearly visible in music and some ritual ceremonies.

The “Pledge of Love” is the first album in a series composed based on the tasnifs by the renowned Iranian tasnif-maker Mohammad Ali Amir Jahed and recorded by Sahba Kohan Ensemble with Ramin Bahiraie as signer.

In this project, my specialized responsibility  was the basic drawings of the desired instrument with the help of engineering and mechanical software.  I have also the carried out phases related to engineering designs, related variables, and volume and weight calculations under Mr. Ziaei’s direct supervision from the very beginning. Regarding the challenges of this work, suffice it to say that the set of designs for the instrument lasted more than 9 months in the final stage of the project only.