ㄅㄚㄧㄣyīn

  1. 材質製成樂器書經·》:四海遏密八音。」文選·沈約·宋書謝靈運》:五色八音。」

music, (used in advertising instrumental tuition)​, (archaic)​ musical instruments made of eight different materials (metal 金, stone 石, clay 土, leather 革, silk 絲, wood 木, gourd 匏, bamboo 竹)​
octave