A-flat major is a musical key that consists of four flats in its key signature: B-flat, E-flat, A-flat, and D-flat. It is often associated with a warm and rich sound, making it popular in various musical genres, including classical, jazz, and pop. The tonic chord of A-flat major is formed by the notes A-flat, C, and E-flat. In terms of scale, the A-flat major scale includes the notes A-flat, B-flat, C, D-flat, E-flat, F, and G. This key is frequently used by composers such as Ludwig van Beethoven and Frédéric Chopin, who have written notable works in A-flat major. The key is also commonly found in jazz music, where it provides a lush harmonic backdrop.