Here's an album from the great Batak composer and musician Nahum Situmorang and his Nahum's Band....
You can find more information about him in the Tempo article (in English) here:
https://magz.tempo.co/read/34402/nahum-situmorang-the-forgotten-lapo-tuak-songwriter
He was born in 1908 and passed away in 1969, they made him a beautiful grave:
