sapeh

The sapeh (sampet, sampeh, sape) is a traditional lute of many of the Orang Ulu or "upriver people", who live in the longhouses that line the rivers of Central Borneo. Sapes are carved from a single bole of wood, with many modern instruments reaching over a metre in length.
Initially the sape was a fairly limited instrument with two strings and only three frets. Its use was restricted to a form of ritualistic music to induce trance. In the last century, the sape gradually became a social instrument to accompany dances or as a form of entertainment. Today, three, four or five-string instruments are used, with a range of more than three octaves.