evidence: With around 18 Dayak or indigenous groups across the third largest island on the planet, there's a world of variety in the music making of Borneo. Divided administratively between Indonesia's Kalimantan state, Malaysia's Sarawak and Sabah provinces and the small sultanate of Borneo nestled within the Malay northern coast. But there's one instrument heard and cherished across all groups on Borneo: the sapeh.