Wikipedia
Kotekan
Kotekan is a style of playing fast interlocking parts in most varieties of Balinese Gamelan music, including Gamelan gong kebyar, Gamelan angklung, Gamelan jegog and others. In kotekan there are two independent parts called polos and , each of which fills in the gaps of the other to form a complete rhythmic texture. In Gamelan gong kebyar, Kotekan is usually played on the higher-pitched gangsa and reyong as embellishment to the main melody (pokok) played on the calung and ugal.
Note: In the transliteration of Balinese used here, the letter "c" represents a sound similar to English "ch".