Sentence:  Small , shirt-sleeved orchestras <WSD>play</WSD> in 2 4 or 4 4 time , using guitars , violins , and more alien instruments with names that would open Sesame : the oud , grandfather of the lute ; the darbuka , a small drum with the treelike shape of a roemer glass ; the def , a low-pitched tambourine . 
Meaning of the word marked with <WSD> tags:  play on an instrument