Dance music is a form of music based on dance. It has many types according to different eras, national characteristics, functions and uses. Dance music usually has a distinctive rhythm and melody, as well as a standardized dance structure. The following are some characteristics of dance music: Distinctive rhythm: The rhythm pattern in dance music is its most distinctive feature. It runs through the entire dance music and helps distinguish different types of dance music. Smooth melody: The melody of dance music is usually concise, lively and dynamic, which can stimulate the enthusiasm and vitality of dancers. Standardized dance structure: Dance music is closely related to specific dance forms, such as waltz, polka, etc., each of which has its own unique dance steps and rhythms. Entertainment at social occasions: Dance music is often performed at social occasions, court balls, concerts and musicals to bring joy and entertainment to the people. Development of music forms: Dance music occupies an important position in classical music and is one of the important components of music in the classical period. Many great composers such as Mozart, Haydn, Beethoven, etc. have created a large number of dance music, enriching the diversity of classical music. Different types of dance music, such as waltz, polka, etc., have their own unique musical characteristics and dance styles, reflecting the characteristics of different regions and cultures. For example, the waltz originated in Austria and is a three-beat dance music. The Viennese waltz is the most famous. It is characterized by a bright rhythm and smooth melody. One chord is often used in each measure of the accompaniment, and the emphasis on the first beat is more prominent.