The D-flat dominant seventh suspended fourth chord (abbreviated "Db7sus4 chord") is a four-note chord consisting of the notes D♭, G♭, A♭, and C♭. The chord is formed by adding a minor seventh to a D-flat suspended fourth chord.
D-flat dominant seventh suspended fourth chord
D♭ G♭ A♭ C♭
1 4 5 ♭7
Tetrad (four-note chord)