There were mainly three schools of music in the early days: the Berlin school of music centered on Bach's second son; Mannheim school centered on Johann Stamitz (1717-1757); The early Vienna Music School was centered on Vagenzar and Munn.
Although opera is an important part of classical music, in general, classical music is characterized by instrumental music, especially sonatas and symphonies. The chamber music and symphony of Mannheim School not only influenced Vienna Music School, but also directly influenced Beethoven in Bonn.
Sonata is a very representative form of classical music. Its presentation part has the contrast between the first and second themes, the development part is in the middle, and the reproduction part is between the two themes. Mannheim Music School had a fairly complete sonata form at that time, and they also added minuets to the symphony. In the symphony orchestration of this music school, woodwind instruments are also made of two pipes. Mozart added clarinet to his symphony, which was also influenced by Mannheim School.
Vienna Classical Music School, represented by Haydn, Mozart and Beethoven, the father of symphony, erected an immortal monument in the history of music. The main feature of this music school is to reflect the universal ideological requirements of human beings. They pursue the concept of beauty, emphasize the elegance of style and give people an optimistic and enterprising spirit.