It is common among Tirurays of Cotabato. The cylindrical drum is struck with either the hands or two short wooden sticks.
The bamboo is split and tied back in both ends, leaving a slit as resonator. Material: bamboo fluteplastic wrapping around the chip Ethnolinguistic Group: Pinatubo Ayta source:wikipedia. The instruments is popular in Sulu. On the right hand, the player hold a mallet padded with rubber.
Gabbang - is similar to a xylophone. The large gong is struck with a special beater. It has a stick to support in its lower end and is played in the same position as cello. By strongly breathing in or out the volume can be changed as well.