Frame Drum Tunable, Mazhar, 55cm (22inch) This style of frame drum is know from the areas of Persia, Uzbekistan, and Azerbijan. Depending on the area it may be called: Daf, Ghaval, Gaval, Dayereh Doira. Regardless of the name, they have a narrow wooden frame with a skin stretched over one side. Held with both hands the head is played with the fingers. Considered a sacred instrument, in Sufi rituals for its power to create trance states. This drum has now established a permanent position in the Iranian classical orchestra and is the most popular drum in Iranian Folk music of Iran.