Commas and accidentals In Turkish music theory, the octave is divided into
53 equal intervals known as
commas (
koma), specifically the
Holdrian comma. Each whole tone is an interval equivalent to nine commas. In practice, only 24 of the 53 commas are used, as highlighted in the figure and table below. The following figure gives the comma values of Turkish accidentals. In the context of the Arab maqam, this system is not of
equal temperament. In fact, in the Western system of temperament, C-sharp and D-flat—which are functionally the same tone—are equivalent to 4.5 commas in the Turkish system; thus, they fall directly in the center of the line depicted above.
Accidentals -based notation), as they are illustrated on a
major tone ("Do"–"Re" in the
solfege system) which is represented by 9 Holdrian commas. Arel-Ezgi-Uzdilek notation adds 6 accidentals in addition to Western music theory's 4 accidentals. Note that the commonly used quarter-tone symbols and are used in this system to indicate a tone's adjusting with a
koma, not a quarter-tone, like in
Arabic maqam and
Helmholtz-Ellis notation.
Makam Rast is therefore notated in the "same" in Arabic and Turkish music, but Turkish Rast's third is a just major third, not a
neutral third.
Notes Unlike in Western music, where the note C, for example, is called 'C' regardless of what
octave it might be in, in the Turkish system the notes are – for the most part – individually named (although many are variations on a basic name); this can be seen in the following table, which covers the notes from
middle C ("Kaba Çârgâh", C) to the same note two octaves above ("Tîz Çârgâh", C): : The following table gives the
tones over two octaves (ordered from highest to lowest), the pitch in commas and cents relative to the lowest note (equivalent to Western middle C), along with the nearest equivalent equal-temperament tone. The tones of the Çârgâh scale are shown in bold. :
Intervals The names and symbols of the different
intervals (
şifre) are shown in the following table:
Tetrachords (dörtlüler) and pentachords (beşliler) Similar to the construction of maqamat noted above, a makam in Turkish music is built of a
tetrachord built atop a
pentachord, or vice versa.
Trichords exist, e.g.
Saba, but are rarely used. Additionally, most makams have what is known as a "development" (
genişleme in Turkish), which can occur either above or below (or both) the tonic and/or the highest note. There are six basic tetrachords, named sometimes according to their tonic note and sometimes according to the tetrachord's most distinctive note: •
Çârgâh •
Bûselik •
Kürdî •
Uşşâk •
Hicaz and •
Rast There are also six basic pentachords with the same names with a tone (T) appended. It is worth keeping in mind that these patterns can be
transposed to any note in the scale, so that the tonic A (Dügâh) of the Hicaz tetrachord, for example, can be moved up a major second (9 commas) to B (Bûselik), or in fact to any other note. The other notes of the tetrachord, of course, are also transposed along with the tonic, allowing the pattern to preserve its character. ==Basic makam theory==