Chord · 6ths & Adds

B♭6/9♯11 — B♭ Six-Nine ♯11

B♭6/9♯11 is the B♭ six-nine ♯11 chord. It is built on the root B♭ with major 3rd (D), perfect 5th (F), major 6th (G), major 9th (C) and augmented 11th (E) above it — the formula 1 3 5 6 9 ♯11, sounding the notes B♭ D F G C E. On the piano it sits at Bb (octave 3) and above in the library's voicing; the same 6 notes in any octave are still B♭6/9♯11.

Root
B♭
Quality
Six-Nine ♯11
Formula
1 3 5 6 9 ♯11
Notes
B♭ D F G C E

On the keyboard

B♭6/9♯11 on the piano keyboard: B♭ D F G C EB♭DFGCE

The notes of B♭6/9♯11

DegreeNoteInterval from the rootPitch
1B♭rootB♭3
3Dmajor 3rdD4
5Fperfect 5thF4
6Gmajor 6thG4
9Cmajor 9thC5
♯11Eaugmented 11thE5

Other 6ths & adds on B♭

B♭6B♭m6B♭6/9B♭m6/9B♭add2B♭add4B♭add9B♭add11B♭add♯11B♭6sus4B♭m(add9)B♭m(add11)B♭add9♯11B♭m6/7B♭m6/9/7B♭m6/11B♭m6♯11B♭m6/9/11B♭m6/9♯11

Six-Nine ♯11 chords on every root

C6/9♯11D♭6/9♯11D6/9♯11E♭6/9♯11E6/9♯11F6/9♯11F♯6/9♯11G6/9♯11A♭6/9♯11A6/9♯11B6/9♯11

Part of the chord reference. See also the scales and the keys.