Gong has an important role in Javanese Gamelan set of tools , Gong is said that mimicked the sound , here in particular gong gong show at Nth vertical hanging , large or medium, at o'clock in the middle of her circle of ( pencu ) with upholstered round shape . Gong works mark the beginning and the end gendhing voice (voice ) and give a sense of balance after passing sentence gendhing song ( votes ) long . Gong is very important to mark the end of the song the basis of per-unit cluster , so cluster itself. Gong always in use second event began as wayang kulit , movies wong etc. . and follow the storyline and the current state penampilanya gong instrument is well enough to be affected so natural Javanese art that inspires the listener itself, not many people that this music should be proficient expertise and effort to learn this instrument . There are two general kinds of gong in the know , namely: - Gong Agung ( large ) and - Gong gong spells or a medium-sized siyem .