Learn to Play Bb / A# Dominant 13
Also written: A# Dominant 13 — same keys, same sound, two spellings of one chord.
What notes are in bb dominant 13?
The bb dominant 13 chord (Bb13) is built from the notes Bb, D, Ab, C, G — root, major 3rd, minor 7th, 9th, 13th.
Bb13
A dominant 7 plus the 13th (in practice: root, 3rd, ♭7, 13 — the 5th, 9th and 11th are implied or omitted). Big name, four-note grip.
How does bb dominant 13 sound?
The full-color dominant — bluesy at the bottom, sweet at the top. The 13th (the 6th an octave up) crowns the tritone with warmth.
A V7 with its Sunday clothes on: same pull to I, but the 13th on top voice-leads down a half step into the tonic's 3rd — the smoothest resolution in jazz.
Where do you use Bb13?
Bb13 is the dressed-up V of Eb: its 13th falls a half step onto Eb's 3rd as you resolve — the smoothest top-voice motion a dominant can make.
Bb is the horn-section default — jazz standards overwhelmingly start in flat keys, and Bb is the first door into that world.
Jazz standards' final V chords, gospel choir hits, big-band shout choruses, and blues players ending a chorus with one fat G13 stab.
How do you finger Bb13 on piano?
The standard grip root-3rd-♭7-13 sits under 1-2-3-5 with a characteristic wide top: the pinky reaches the 13th a 6th above the thumb's octave line.
Five-note grips are often split between the hands or rolled — keep the top note singing.
Tip: the common mistake
Reading "13" and trying to stack seven notes. The chord is defined by 3rd + ♭7 + 13; everything else is optional. Play the shell, not the encyclopedia.
Reading about Bb Dominant 13 is step one — recognizing it at speed is the game. Chord Rush drills it until your hands know it.
- ⚡Speed
- ◎Accuracy
- ♪Recognition