D♭ Major is a musical key that consists of five flats in its key signature: B♭, E♭, A♭, D♭, and G♭. It is often associated with a warm and rich sound, making it popular in various genres, including classical and jazz. The tonic chord of D♭ Major is formed by the notes D♭, F, and A♭. In terms of scale, the D♭ Major scale includes the notes D♭, E♭, F, G♭, A♭, B♭, and C. This scale serves as the foundation for many compositions and can evoke a range of emotions. Notable works in D♭ Major include Beethoven's "Piano Sonata No. 30" and Chopin's "Nocturne in D♭ Major."