A♭ major is a musical key that consists of four flats in its scale: B♭, E♭, A♭, and D♭. It is often associated with a warm and rich sound, making it popular in various genres, including classical and jazz. The tonic note, A♭, serves as the home base for melodies and harmonies in this key. In terms of its relative minor, A♭ major is related to F minor. This means that both keys share the same key signature but have different tonal centers. Composers and musicians often explore A♭ major for its expressive qualities and emotional depth.