Summary : in the baroque period , bach , the great master in polyphony , created the prelude and fugue , using the the well - tempered clavier for the clavier instrument at that time , which is one of the most important works in the polyphony music till now 摘要巴洛克时期，复调大师巴赫就用十二平均律为当时的键盘乐器创作了《序曲与赋格》 （上下册，各24首） ，迄今为止都是非常重要的复调音乐文献。
Piano timing is based on diapason normal and " the twelve melody of averages " and certain programs of musical rules as well as auditively distinguished " beat note " and it uses some instruments to adjust the tension of the piano ' s strings and the normal functioning of a piano ' s key mechanism 摘要钢琴调律是以国际标准音高，以律学中的“十二平均律”为理论依据，以一定的生律程序、以听觉分辨“拍音”为判断依据，使用专用工具对琴弦的强力及机件的合理运动进行调整。
