Duff MuttuAnother popular Muslim art form in northern Kerala is duff muttu, which is similar to arabana muttu. The difference between these two art forms is in the size and shape of the percussion instrument used. Most of the songs in duff muttu tell stories based on legends or the lives of martyrs and holy men. The performers are led by a group leader and they move in circles beating the duffs in a rhythm. The art form is usually performed as part of the festivals related to mosques or to commemorate events. The percussion instrument used is called the duff and the dance derives its name from it. The instrument is made of wood and ox skin and is also called thappitta.