Kempul
Kempul Instruments in the 1st category include large and medium hanging gongs, small hanging gongs (kempul), large standing gongs (kenong), and a pair of small standing gongs (kethuk-kempyang)." "The role of the kempul is to divide the nongans, which are the contents of each part between strikes of a kenong." In the middle of the gamelan, the 'skeletal' melody called the balungan is played on bronze metallophones. The balungan is puntuated by the larger gongs and horizontally-mounted gongs (kenong, kethuk, and kempyang) at the back of the gamelan." "The kempul, a middle voice gong, punctuates half way to the mid-points of the metric cycle, which is played by the kenong (the kettle gongs)." In all the central Javanese traditions, the pieces known as Ayak-ayakan, Srepegan, and Sampak are united by a single relationship between kempul and kenong: one kempul beat coinciding with every 2nd kenong beat." Theres are two racks of gongs in a gamelan ...