In the tradition of classical music, it is generally tried to use the same technical terms related to music in all countries. Even in the cultures in which native terms exist to refer to musical terms, usually the better known universal terms are employed.

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).

Developments in Composing

Along with developments in the Iranian instruments, composition of the Iranian pieces developed as well. As a matter of fact, the developments of the two, mutually affected each other. In other words, instrumental developments led to developments in composition and vice versa.

Ali Tajvidi (1920 – 2004), one of the most prominent Iranian musicians, passed away sixteen years ago. He was one of the most distinguished Iranian artists. To specify one of the fields in which he was unique, one can refer to Tasnif composition. A brief review of his manifold musical activities is presented below.

Fantasia on One Note was my first professional work for piano, which had its world premiere by the great pianist Peter Jablonski in Sweden, and it has been performed by various pianists in the UK, Germany, France, and the Czech Republic. The recording of this work has also been broadcast on the Dutch public radio, NPR Radio 4.

Creating sound continuity between two notes in the source and destination positions when left hand position changes and “two different finger numbers” are involved is called portamento. Portamento can be performed on single string or two neighboring strings and with hand moving on fingerboard either upward or downward.

A part of the secrets of the masterpieces from the golden era lies in the special design of the instruments, as a result of a profound insight to and awareness of the significance of the precise calculation of the various components of the object of arts being created, such as making a violin or a bow.

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].

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

Regarding the classification of a new instrument in an instrument family, one can point to a number of fundamental issues, one of the most obvious of which is the instrument’s visual features. If we look at how the new instrument has changed compared to its historical versions, the set of visual elements that link the instrument to the Qeychak family becomes apparent. But other characteristics such as the geometric dimensions of the instrument, characteristics of the instrument’s various parts and how they relate to each other, its systematic performance, its sound range (compared to modern versions), the material and color of the sound, the way it is played and the like, can be considered in order to classify the instrument in the Qeychak family.