This document discusses traditional Thai music from northern Thailand. It describes 3 main musical instruments used in northern Thai music - the khaen, phin, and kong. It provides background on the khaen bamboo mouth organ, including its 11 pipes and 3 playing techniques. It also briefly outlines the phin two-stringed fiddle and kong xylophone, and notes that northern Thai music features call-and-response singing over instrumental accompaniment.