# The A♭ major Prelude, harmony only (after Bach, BWV 862)

**Composer of this Composition:** Peter · **License out:** CC BY-SA 4.0
**Meter:** 3/4 · **Tempo:** quarter note ≈ 80 BPM · **Length:** 44 bars, 40 chords
**Directionality:** 0.3 (stay close to the chords; textures are welcome if the harmony is right)
**Allowed transforms:** trim, gain, fade (no pitch-shift, no time-stretch)

## Prose

A sunny dance in three. Open, warm and lightly sprung, walking the circle of fifths. It goes out to
E-flat (bars 9–21), turns home (bars 22–25), and leans to D-flat (bars 26–32), the warmest stretch.
The home cadence comes back more and more certain, and the final A-flat is held. Daylight, not a cathedral.

Two bars on one chord: Bb7 (bars 18–19), Eb7/Bb (bars 22–23), Ab7 (bars 24–25) and Eb7 (bars 33–34).

## Chord anchors

| Bar | Chord | Bar | Chord | Bar | Chord |
|---|---|---|---|---|---|
| 1 | Ab | 2 | Eb7/G | 3 | Ab/Eb |
| 4 | Eb7 | 5 | Ab | 6 | Fm7 |
| 7 | Bbm7 | 8 | Eb7 | 9 | Ab |
| 10 | Gm/D | 11 | Fm/C | 12 | Eb/Bb |
| 13 | Ddim/Ab | 14 | Eb/Bb | 15 | Fm7/C |
| 16 | Bb7 | 17 | Eb/G | 18 | Bb7 (bars 18–19) |
| 20 | Eb | 21 | Bb7 | 22 | Eb7/Bb (bars 22–23) |
| 24 | Ab7 (bars 24–25) | 26 | Db/F | 27 | Cm7/Eb |
| 28 | Bbm7/Db | 29 | Abmaj7/C | 30 | Bbm7 |
| 31 | Ab/C | 32 | Bbm7/Db | 33 | Eb7 (bars 33–34) |
| 35 | Ab | 36 | Fm7 | 37 | Bbm7 |
| 38 | Eb7 | 39 | Ab | 40 | Bbm |
| 41 | Fm/C | 42 | Eb/Bb | 43 | Eb7 |
| 44 | Ab |  |  |  |  |

Slash chords name the bass. A Performer that can't match a bass note may let it go, but it should keep the chord.
The bar number is the bar where the chord starts. Four chords last two bars, as the structure line says.

## Composition

*Structure:* `3/4 · 80 BPM · [1 bar Ab][1 bar Eb7/G][1 bar Ab/Eb][1 bar Eb7][1 bar Ab][1 bar Fm7][1 bar Bbm7][1 bar Eb7][1 bar Ab][1 bar Gm/D][1 bar Fm/C][1 bar Eb/Bb][1 bar Ddim/Ab][1 bar Eb/Bb][1 bar Fm7/C][1 bar Bb7][1 bar Eb/G][2 bars Bb7][1 bar Eb][1 bar Bb7][2 bars Eb7/Bb][2 bars Ab7][1 bar Db/F][1 bar Cm7/Eb][1 bar Bbm7/Db][1 bar Abmaj7/C][1 bar Bbm7][1 bar Ab/C][1 bar Bbm7/Db][2 bars Eb7][1 bar Ab][1 bar Fm7][1 bar Bbm7][1 bar Eb7][1 bar Ab][1 bar Bbm][1 bar Fm/C][1 bar Eb/Bb][1 bar Eb7][1 bar Ab]`

## Credits

- **Music:** Johann Sebastian Bach, public domain. Prelude from *Das Wohltemperierte Klavier* I (1722).
- **Harmony:** Mark Gotham et al., *When in Rome*, CC BY-SA 4.0, commit 1c61fe4,
  https://github.com/MarkGotham/When-in-Rome, `Corpus/Keyboard_Other/Bach,_Johann_Sebastian/The_Well-Tempered_Clavier_I/17/analysis.txt`.
  The Roman numerals were converted to absolute chord symbols, so this harmony is an adaptation and is shared alike.