This document discusses the traditional musical instruments of the Cordillera region in the Philippines. It first classifies instruments into four categories: chordophones which produce sound from vibrating strings; aerophones which are wind instruments; membranophones which are drum-type instruments sounded by hand; and idiophones which make sound from the instrument itself. It then provides examples of specific indigenous instruments from different ethnic groups in Cordillera, including the pas-ing bamboo guitar of the Igorots, the diw-diw-as and kalaleng panpipes of the Tingguians, and the sulibao drum, balingbing buzzer, and other percussion instruments of the Ibalois,