Angklung is a traditional Sundanese musical instrument made from bamboo. The sound comes out when shaking it. One angklung represents one note, so it is usually played in a group.
Saung Angklung Udjo is a group well-known for its angklung performance, kind of the pioneer actually in taking this traditional instrument and introducing it professionally world-wide.
If you ever get the chance to go to Bandung, besides going for shopping & eating...try and stop by at their workshop. Having read many reviews, you won't be disappointed!
To know more, check out Saung Angklung Udjo's website: http://www.angklung-udjo.co.id/