D-Flat 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 musical genres, including classical, jazz, and contemporary music. In terms of scale, the D-Flat Major scale includes the notes D♭, E♭, F, G♭, A♭, B♭, and C. Composers like Frédéric Chopin and Johannes Brahms have utilized this key in their works, showcasing its expressive qualities and emotional depth.