sentences:  It also serves as the penultimate piece of the "Mevlevi ayini", ritual music of the Mevlevi order, under the name "son peşrev" (final peşrev), preceding "son semai".It usually uses long rhythm cycles, stretching over many measures as opposed to the simpler usul the other major form of instrumental music uses, "saz semai".Along with the "saz semai" (called "sama'i" in Arabic), it was introduced into Arabic music in the 19th century, and became particularly popular in Egypt.