孔子把《诗》《书》《礼》《乐》《易》《春秋》定为六经。秦焚书之后,《乐经》亡,剩下五经。《乐经》中是否有乐谱,后人就不得而知了。中乐理论的第一块里程碑是“宫、商、角、徵、羽”五声的确立。最早见于《管子·地员篇》,“凡听徵,如负豕……凡听宫……”《管子》成书年代虽有争议,但至少也有二千多年的历史。第二块里程碑是制定十二律吕,即:“黄钟、大吕、 Confucius defined the Book of Songs as the Book of Rites, the Book of Music, the Book of Music, the Book of Songs, the book of Spring and Autumn. Qin burning books, ”The Book of Music“ died, leaving the five classics. There is no music in the Book of Music. The first milestone in the theory of Chinese music is the establishment of the fifth ”sound of palace, business, horns, levy and feather“. The earliest seen in ”pipe member“, ”who listen to levy, such as negative 豕 ... where to listen to the palace ... ...“ ”pipe“ Although the book controversial years, but at least 2,000 years of history. The second milestone is the development of twelve Lu, namely: ”yellow bell, big Lu,