Waltz, sometimes transliterated as "Waltz", is a folk dance in Austria. It was used in social dances in the second half of the 18th century. It became popular in Western European countries in the 19th century. It uses 3/4 Beat, emphasizing the stress on the first beat, the melody is smooth, the rhythm is obvious, and only one chord is used in each measure of the accompaniment. Because the dance requires two people to rotate in pairs, it is called a waltz.

The waltz originated from a folk three-beat dance in northern Austria. The waltz is divided into fast and slow steps. During the dance, two people rotate in pairs. After becoming popular in the Vienna court in the 17th and 18th centuries, it gradually gained speed and was first used in urban social dances. It became popular in European countries in the 19th century. Most of the waltzes that are popular nowadays are Vienna-style waltzes with a tempo of Allegro. They are characterized by bright rhythms and smooth melody. One chord is commonly used in each measure of the accompaniment, and the emphasis on the first beat is more prominent. The famous waltzes include John Schitt Rouse's "The Blue River", Weber's "Invitation to Dance", etc. Waltz is a foreign music genre to our country. In English, it is sometimes transliterated as "waltz". Dance music generally originated in rural areas. The waltz developed with the development of society in cities, especially in Vienna. Therefore, some waltzes are also called Vienna waltzes. Tracing back to its roots, the predecessor of the waltz is the Austrian folk "Landerer Dance", which is also a rural dance music. Waltz is a three-beat dance developed on the basis of "Landler Dance". During the dance, pairs of male and female partners rotate and make circles according to the rhythm of the dance music. The movements are brisk and graceful, and the mood is warm and cheerful. These characteristics determine the genre characteristics of the waltz: faster speed, beat or beat. These characteristics, combined with the tones rotating around the fulcrum sound, vividly produce a sense of rotating and circular movements. The genre characteristics of the waltz are more clearly reflected in its accompaniment patterns. The typical waltz accompaniment pattern is three even quarter notes (eighth notes on the beat) with distinct strengths and weaknesses, one chord per measure, and the first beat is a strong beat, playing the bass of the chord. The second and third beats are weak beats, playing other chord tones in the higher register.