The Cambodian ensemble—which has traditionally accompanied court dance, masked plays, and shadow plays and ceremonies—is composed of vocalists and instruments:
gong chimes, reed instruments,
metallophones,
xylophones,
drums, and ching. A Thai ensemble consists of stringed fiddles,
flutes,
zither, xylophones, gong circles, drums, and ching. Melody in both Thai and Khmer musics is regulated by cyclic patterns realized on the drums and ching. ==Historical significance==