The name “Air on the G String” is a later addition, and it refers to the fact that the melody is played on the G string of the violin, giving it a soft and gentle quality. The piece is known for its serene and elegant melody, making it a popular choice for weddings and other special occasions. It is actually a part of a larger work called the Orchestral Suite No. 3 in D major, BWV 1068. This suite is a collection of dance movements, and the “Air” is the second movement.
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