The 7#9 chord is formed by the intervals root (1), major third (3), perfect fifth (5), minor seventh (b7) and augmented ninth (#9). In this chord thus sound the notes B♭, D, F, A♭ and C♯. To hear the B♭7#9, click on the chord diagram. To highlight some chords with a yellow background, click on top of the diagram. This selection can be saved by copying the link from the browser.