The changgo is an hourglass-shaped double-headed membranophone of the Korean people. It is the most widely used Korean drum, utilized in nearly every genre of folk, religious, classical/court, and contemporary/traditional hybrid music that includes drumming. The particular type of changgo pictured here is used for nongak (folk bands, sometimes referred to as farmers' music) and is called the solchanggo.shells made from pottery are also found) and is hollow even in the constricted center section. Its two identically sized heads, made from dog skin (cow, goat, pig, and horse skins are also used, depending on the genre), are stretched over metal flesh hoops. The diameter of the heads is a good deal greater than the openings of the shell that they cover. The solchanngo is sounded by striking its heads with beaters--a slender bamboo stick (called yol ch'ae) is held in one hand, a heftier one (called kunggul ch'ae or k'ung ch'ae) with a wooden disc head and bamboo stem in the other.