Bach's Great Contribution to the Music Law System —— The Piano Music Collection with Average Law Bach's Piano Music Collection with Average Law is an epoch-making work, which proves the superiority and practical value of the twelve-average law through creative practice. It is often called "one of the most important milestones in the history of all music" and "the old testament of piano music", while Beethoven's 32 sonatas are called "the new testament of piano music". Before that, keyboard instruments were mostly tuned according to the golden mean, and the scales that could be played without losing tune were only B-flat, F-flat, C-flat, G-flat, D-flat, A-flat and G-flat, D-flat, A-flat, so composers were greatly limited in tone selection and modulation. Using the law of twelve averages, you can choose twenty-four tones of different sizes and tune them freely. Therefore, without Bach's practice of the law of averaging, the development of modern music will be delayed for a long time. Bach tuned his keyboard instrument to the twelve-tone rhythm very early, and wrote the first set of piano music in the twelve-tone rhythm, including twenty-four preludes and fugues (1722) arranged in the order of twenty-four tones. In his later years, he wrote the second episode in Leipzig, including another 24 preludes and fugues (1744). Bach's collection of piano music with equal rhythm was inspired by the composer Fischer (about 1665- 1746). 1702, Fischer published "Ali Adeni of New Organ Music", which contains 20 preludes and fugues, belonging to 20 different keys. The title of this work originates from Greek mythology. Ali Adene is the daughter of Wang Mi North, a Crete country in classical mythology. Her mother Percy Faher gave birth to a monster with a cow's head. Minos kept it in a maze and ordered the Athenians to pay tribute to seven pairs of men and women every year to feed the monster. Theseus, the prince of Athens, vowed to do harm to others. He crucified the monster with a string ball and a magic knife given by Ariadne, and then walked out of the maze along the line on the road. "Ariadne of new organ music" means to instruct the organist to lead the way through the maze of various sounds (hence the western idiom "Ariadne's line" to describe the solution to the problem). This work uses 19 of the 24 major, only C and F major, E, B and G minor are useless, and E minor is used twice. All the preludes and fugues are very short songs, and the theme is very similar to that in Piano Collection with Equal Rhythm. Bach absorbed predecessors' experience, and wrote "Equal Rhythm Piano Music Collection" with all 24 sounds of different sizes, which is of high artistic value and is the first case in the history of music. When many people talk about JohannSebastianBach, they will definitely think of his music structure. Bach's musical texture and counterpoint have precise mathematical proportions, which makes it more difficult for players to play orchestration. Bach's music has deeply influenced the whole European music scene. He composed a lot of church music in his life. People like to regard Bach's spirit as a symbol of dedication to God. His music is profound, sacred and serious, and his heart is with God. Fu Lei wrote a letter to Fu Cong, saying: "Bach was bound by the Christian spirit, and often fell at God's feet, trembling, shouting, repenting and praying. This is Fu Lei's prejudice against Bach. Bach's music, like Beethoven's, is also an expression of "strength". Bach's "strength" is based on height and depth. His heart is with God, and at the same time it sublimates the secular desires of life, suffering, fear and pain. There is joy and fatigue in suffering, but the greater spirit is to persist even though you know the suffering of life. Beethoven's music is criss-crossed, and the "power" between phrases is full of charm. This is a big universe and a big life. He has no family and no children, so even pain is the pain of a big life. Many actions reveal the heroic nature of fighting against fate. To say that Bach's music is too philosophical and religious, it is better to say that Bach experienced extreme human suffering and broke the hypocrisy of officialdom. However, he sublimated all these major issues. His violin concerto BWV 104 1 in a minor was written in 1720. It is said that Bach wrote it to himself. At the age of 35, he was in high spirits, but he suffered the pain of life and the death of his family. Bach had twelve children, ranking the top eight, six of whom died young. The first wife died in the summer of 1720. The music is divided into three parts, Allegro I, Allegro II and Allegro III. The whole work is full of musical sense, which is a deep understanding of Bach's movement.