Octave
Eight sounds are eight kinds of materials of East Asian traditional instruments, but also refers to the eight materials according to the production of materials: gold (metal), stone, silk, bamboo, 匏, soil, leather, wood "Zhou", "Chun", "Zong Bo": "to the six", "the sun" "Six" and "six" and "six verses", "all six musicians to five, broadcast to eight sounds" ▪ "Zhou" "spring official" "music teacher": "master palm six law Six with the ... ... are broadcast to the eight sound: stone soil leather silk wood bamboo "Oh ~ ...