Fretboard
Chord Identifier & Player

B♭aug chord

B♭ augmented. The notes are B♭, D and F♯. Also written A♯aug. Four ways to play it are below the neck.

B♭augAugmented
B♭ · D · B♭ · D · F♯R 3 ♯5also
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Ways to play B♭aug

Open position first, then up the neck. Tap a shape to put it on the fretboard above and hear it. The numbers are fingers (1 is your index), × means leave that string out, and ○ means let it ring open.

What's in B♭aug

An augmented triad stacks two major 3rds: root, major 3rd and sharp 5th. B♭aug is B♭, D, F♯. Major 3rds split the octave into three equal parts, so B♭aug, Daug and G♭aug are the same three notes; the bass decides which name fits.

NoteFormulaInterval from B♭
B♭1Root
D3Major 3rd
F♯♯5Augmented 5th

Dreamy and unresolved, a major chord with its 5th pushing upward. You mostly hear it in passing: between I and IV, or in a line cliché where the 5th climbs a half step at a time.

Keys that use B♭aug

An augmented triad doesn't fit inside any major or natural minor scale, so it never shows up as a home-key chord. It is a passing chord, borrowed for a beat on the way somewhere else, as in the progressions below.

Progressions to try

I–I+–I6–I7 in B♭ major

  1. B♭
  2. B♭aug
  3. B♭6
  4. B♭7

The line cliché: the 5th climbs a half step at a time while the rest of the chord holds still.

V+–I in E♭ major

  1. B♭aug
  2. E♭

The raised 5th leans into the 3rd of the next chord.

Other chords on B♭:

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