The SwarShala Indian music software includes Duff and over 100 other perfectly sampled virtual Indian instruments.
Duff is a percussion instrument made of wood and parchment originally from Persia. In India, this wooden casing drum is common in Maharashtra. it is significantly used in folk and traditional music and dance, especially in 'Povada' and 'Sahiri' melodies.
The Duff is made from the jingles (slender metal plates or rings) that are connected to snares in three or four rectangular openings in the circular wooden casing. The drumhead is made of fish or goatskin. The width of the casing is 45-50 cm (18-20 in.), and the depth is 5-7 cm (2-3 in.). To twist the casing, the wood ("buka," "orev") might be softened in water before being bowed around a hot metal chamber. The casing is shut by sticking the ends together. Finally, the skin is connected to the casing by fixing it with another wooden casing or nails. Another variety is to have the ring-style jingles organized around the edge of the drum the entire way around or to have a few levels halfway around within the edge.
Duff's sound is produced by hitting the layer with one or the other hand - the left hand, which additionally holds the Duff, strikes the edges, and the right-hand strikes the middle. The right-hand fingers are attached to their neighbors and suddenly released to create quick, sharp sounds.