The sound of a Kalimantan string instrument, or sampe, emerged from Shanty's smartphone. It sounded like an Indian sitar, only softer. "When I heard it, I felt like I was in the middle of a jungle," said the female entrepreneur from Samarinda, East Kalimantan. It was a few seconds until the sampe was joined by a full ensemble.

The song on the 38-year-old woman's phone, Hudoq, was performed by Youths of Kalimantan (YK) Band. The song, rearranged with t