Theory

Pisagor koması (Pythagorean comma)

Pisagor koması

The amount by which twelve pure fifths (3/2) stacked on top of each other exceed seven octaves; its ratio is 531441/524288, about 23.5 cents. In Arel-Ezgi-Uzdilek theory the comma is this interval: the bakiye, küçük mücenneb, büyük mücenneb and tanini intervals are built from Pythagorean ratios and counted as 4, 5, 8 and 9 commas. These counts are approximate; the bakiye (256/243, about 90 cents), for example, is not exactly 4 Pythagorean commas.

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Other terms in Theory

Ara perde (in-between pitch)Interval Dik Scale Esnek perde (flexible pitch)Holder koması (Holdrian comma)Kaba (low)Koma (comma)Mûsikî Nağme Theory Nim Octave Perde (pitch)Ses düzeni (tuning system)Tam perde (main pitch)Tiz (high)

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Sources

The definitions were written in our own words, drawing on sources such as the TDV Encyclopedia of Islam, Yılmaz Öztuna's Encyclopedic Dictionary of Turkish Music and Wikipedia; pitch and interval values follow the Arel-Ezgi-Uzdilek system. This content has not yet been reviewed by an expert; if you spot a mistake, please write to us.

TDV İslâm Ansiklopedisi

Yılmaz Öztuna, Türk Musikisi: Akademik Klasik Türk San'at Musikisi'nin Ansiklopedik Sözlüğü, Kültür Bakanlığı Yayınları, Ankara, 1990.

H. Sadettin Arel, Türk Mûsikîsi Nazariyatı Dersleri (haz. Onur Akdoğu), Kültür Bakanlığı Yayınları, Ankara, 1991.

Vikipedi, “Türk müziği” maddesi.