《吕氏春秋·纪·季夏纪》
黄钟、大吕、太蔟、夹钟、蛄洗、仲吕，蕤宾等乐律是由上生而得，林钟，夷则，南吕、无射，应钟等乐律是由下生而得。
黄钟、大吕、太蔟、夹钟、姑洗、仲吕、蕤宾为上，林钟、夷则、南吕、无射、应钟为下。
Yellow bell, Grand bell, Grand Progenitor, Middle bell, Maiden’s washing, Middle melody, Flourishing guest, etc. are pitches produced by going upwards, and forest bell, Equalizing rule, Southern melody, No shooting, Resonant bell, etc. are pitches produced by going downwards.