纯律与十二平均律不同。音阶中各音与主音的关系均为纯音程。由于这样形成的半音无法分平均,所以不能随便转调,由于使用不便,现在较少使用。主音调式音阶里的第一音。十二平均律音律的一种。把一个八度音均分为十二个半音,半音的音程都是相等的。这一律制的理论最早由中国明代大音乐家朱载育确立。钢琴、竖琴等乐器均按此律定弦。 Pure law and the average law of twelve different. The relationship between the notes in the scale and the tonic is pure tone. Since the semitones thus formed can not be evenly divided, they can not be easily transferred and are less commonly used due to inconvenience of use. The first tone in the main tone scale. Twelve average temperament of a law. Divide one octave into twelve semitones, and the semitones have the same pitch. The theory of this system was first established by Zhu Dayu, a great musician in Ming Dynasty in China. Piano, harp and other instruments are in accordance with this law.