The central tones of a maqam are created from two different intervals. The eleven central tones of the maqam used in the phase sequence example above may be reduced to three which make up the "nucleus" of the maqam: The tone rows of maqamat may be identical, such as maqam bayati and maqam 'ushshaq turki: sign indicating quarter tone flat But be distinguished by different nuclei. Bayati is shown in the example above, while 'ushshaq turki is: • Maqam Bayat on La: La / Si (Half-flat) / Do / Re / Mi / Fa / Sol / La. • Maqam Bayat Si: Si / Do (Half-Sharp) / Re / Mi / Fa sharp / Sol / La / Si. • Maqam Bayat Do: DO / Re (Half-flat) / Mi flat / Fa / Sol / La flat / Si flat / Do. • Maqam Bayat Re: Re / Mi (Half-Flat) / fa / Sol / La / Si Flat / Do / Re. • Maqam Bayat Mi: Mi / Fa (half-Sharp) / Sol / La / Si / Do / Re / Mi. • Maqam Bayat Fa: Fa / Sol (half-flat) / La flat / Si flat / Do / Re flat / Mi flat / Fa. • Maqam Bayat Sol: Sol / La (Half-flat) / Si Flat / Do / Re / Mi flat / Fa / Sol. • Maqam Bayat Si Flat: Si Flat / Do (Half-Flat) / Re flat / Mi flat / Fa / / Fa Sharp / La flat / Si flat. • Maqam Bayat Do Sharp: Do Sharp / Re (Half-Sharp) / Mi / Fa Sharp / La flat / La / Si / Do sharp. • Maqam Bayat Mi Flat: Mi flat / Fa (Half-flat) / Fa Sharp / La flat / Si flat / Si / Do flat / Re flat. • Maqam Bayat Fa Sharp: Fa Sharp / Sol (Half-Sharp) / La / Si / Do Sharp / Re / Mi / Fa Sharp. • Maqam Bayat Sol Sharp: Sol Sharp / La (Half-Sharp) / Si / Do Sharp / Re Sharp / Mi / Fa Sharp / Sol Sharp. (H-F) is Half-Flat - keep in mind that flat lowers the note half step down, half flat means the note is lowered 1/4 step down. (H-S) is Half-Sharp - sharp raises the note half step up, half sharp raises it 1/4 step up). Quartertone Intervals are not fixed. A general rule: they tend to be less flat while playing an ascending phrase and vice versa. Those intervals also differ from region to region. In Turkish
Ottoman music, the Beyati quartertone is generally played slightly less flat than the ‘darker’ Ussak tone. == Structure ==