"A complete gamelan gambuh requires approximately 17 musicians to accompany the dance-drama. The main instruments in gambuh performances are very low bamboo flutes called suling gambuh, ...
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between 75 and 100 cm in length and 4 and 5 cm in diameter. There are usually four such flutes, but sometimes as few as two or as many as six. ..." - Wikipedia (en) über Gambuh, 19.12.2018