Samai

The Samai (plural Sama'iyyat) is a composed genre comprised of four sections (khana, plural khanat), each followed by the refrain (taslim).

The samai composition demonstrates the 10/8 rhythmic mode (called samai thaqil) followed throughout the taslim and the first 3 khanat. The 4th khana, which precedes the last statement of the refrain, is typically composed in a 3/4 or 6/4 rhythm, called Samai Darij. Some contemporary composers display a 5/8, 7/8 or 9/8 rhythm in the 4th khana.

The first three khanat of the Samai consist of 4 to 6 measures. The last (4th) khana varies from 6 to 24 measures.

Generally the first khana in the Samai displays the selected maqam in a stepwise motion. It is usually played in the lower tetrachord (jins) of the maqam. The second khana shows a modulation to a related maqam. In the third khana the melodic range expands and reaches the higher tetrachord of the maqam.

Source

• http://www.maqamworld.com/forms.html