# B Augmented piano chord (Baug)

Baug contains B, D♯ and F×. Two stacked major thirds. D♯ is a black key; B and F× are white.

- Canonical page: https://piano.org/chords/augmented/b/
- Entity: chord:augmented:b
- Notes: B D♯ F×
- Formula: 1 3 ♯5
- Intervals from root: P1, M3, m6
- Interval stack (semitones): 4 4
- Also written: Baug, Baug, B augmented
- Parameters: A440, 12-TET, 165 mm octave, spans centre to centre

## Construction

| Degree | Note | Interval from root | Semitones |
| --- | --- | --- | --- |
| 1 | B | Perfect unison | 0 |
| 3 | D♯ | Major third | 4 |
| ♯5 | F× | Minor sixth | 8 |

## Fingering

Rest your right hand over the notes with finger 1 on B, finger 3 on D♯, finger 5 on F×. The left hand mirrors it.
Right hand 1-3-5, left hand 5-3-1. Source: piano.org fingering method v1.

## Inversions

| Position | Bass | Notes in order | Figured bass | Span |
| --- | --- | --- | --- | --- |
| Root position | B | B3 D♯4 F×4 | 5/3 | 8 st, 110 mm |
| First inversion (Baug/D♯) | D♯ | D♯4 F×4 B4 | 6/3 | 8 st, 110 mm |
| Second inversion (Baug/F×) | F× | F×4 B4 D♯5 | 6/4 | 8 st, 110 mm |

## Voicings (5)

| Voicing | Notes | Span | Relation | Omits or adds |
| --- | --- | --- | --- | --- |
| Close, root position | B3 D♯4 F×4 | 8 st, 110 mm | identical | none |
| Close, first inversion | D♯4 F×4 B4 | 8 st, 110 mm | identical | none |
| Close, second inversion | F×4 B4 D♯5 | 8 st, 110 mm | identical | none |
| Open, fifth on top | B2 F×3 D♯4 | 16 st, 220 mm | identical | none |
| Root and third only | B3 D♯4 | 4 st, 55 mm | subset | omits F× |

## One-edit neighbors

| Becomes | Edit | Changes | Common tones |
| --- | --- | --- | --- |
| Baug7 | 1 3 ♯5 ♭7 | adds A | 3 |
| B | 1 3 5 | F× becomes F♯ | 2 |
| Bmaj7 | 1 3 5 7 | F× becomes F♯, A♯ | 2 |
| B7 | 1 3 5 ♭7 | F× becomes F♯, A | 2 |
| B6 | 1 3 5 6 | F× becomes F♯, G♯ | 2 |
| Badd9 | 1 3 5 9 | F× becomes F♯, C♯ | 2 |
| Bm | 1 ♭3 5 | D♯, F× becomes D, F♯ | 1 |
| Bdim | 1 ♭3 ♭5 | D♯, F× becomes D, F | 1 |
| Bsus2 | 1 2 5 | D♯, F× becomes C♯, F♯ | 1 |
| Bsus4 | 1 4 5 | D♯, F× becomes E, F♯ | 1 |

## Set theory

- Absolute pitch classes: {11, 3, 7}
- Relative pitch classes: [0, 4, 8]
- Normal order: [3, 7, 11]
- Prime form: (048)
- Forte number: 3-12
- Interval vector: <000300>

## Frequencies (close root position)

| Note | MIDI | Frequency |
| --- | --- | --- |
| B3 | 59 | 246.94 Hz |
| D♯4 | 63 | 311.13 Hz |
| F×4 | 67 | 392.00 Hz |

## Questions and answers

### What notes are in Baug?

Baug contains B, D♯ and F×. The formula is 1, 3, ♯5.

### How do you play Baug on piano?

Play B, D♯ and F× together. Right hand fingers 1, 3, 5; left hand 5, 3, 1. D♯ is a black key; B and F× are white.

### What are the inversions of Baug?

3 positions: root position B D♯ F×, Baug/D♯, Baug/F×.

### What is the difference between Baug and Baug7?

Adds A. 3 of the notes are shared.

### What is an easy Baug for small hands?

The root and third only voicing, B3 D♯4, spans 4 semitones or about 55 mm.

### What are the frequencies of Baug?

From B3 at A440 in 12-TET: 246.94, 311.13, 392.00 Hz.

### What is the set class of Baug?

Prime form (048), Forte 3-12, interval vector &lt;000300&gt;.

### How do I transpose Baug to another key?

Keep the 1, 3, ♯5 formula on the new root. Caug is C, E, G♯; D♭aug is D♭, F, A.

### Is C♭aug the same as Baug?

Enharmonically yes: the same piano keys and the same sound, spelled differently.

## Provenance

Every derived value above is computed by the piano.org theory kernel from the root, the quality and the stated parameters. Nothing is hand-entered per chord.

Machine record: https://piano.org/api/knowledge/v1/entities/chord:augmented:b
Last reviewed: 2026-08-12