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B♭ acoustic scale on guitar
B♭ acoustic uses B♭, C, D, E, F, G, A♭. Box 1 places the raised fourth on the first string.
How it is built
Formula 1, 2, 3, ♯4, 5, 6, ♭7
How do you play the B♭ acoustic scale on guitar?
B♭ acoustic in box 1 runs from fret 0 to fret 3, 16 notes across 6 strings, from E on the low E string at fret 0 up to G on the high e string at fret 3. The root falls on the A string at fret 1 and the G string at fret 3.
Every note in this box, string by string
| String | Frets | Notes |
|---|---|---|
| 6 (E) | 0, 1, 3 | E, F, G |
| 5 (A) | 1, 3 | B♭, C |
| 4 (D) | 0, 2, 3 | D, E, F |
| 3 (G) | 0, 1, 3 | G, A♭, B♭ |
| 2 (B) | 1, 3 | C, D |
| 1 (e) | 0, 1, 3 | E, F, G |
Box 2 · frets 3–6
B♭ acoustic in box 2 runs from fret 3 to fret 6, 16 notes across 6 strings, from G on the low E string at fret 3 up to B♭ on the high e string at fret 6. The root falls on the low E string at fret 6, the G string at fret 3 and the high e string at fret 6.
Every note in this box, string by string
| String | Frets | Notes |
|---|---|---|
| 6 (E) | 3, 4, 6 | G, A♭, B♭ |
| 5 (A) | 3, 5 | C, D |
| 4 (D) | 3, 5, 6 | F, G, A♭ |
| 3 (G) | 3, 5 | B♭, C |
| 2 (B) | 3, 5, 6 | D, E, F |
| 1 (e) | 3, 4, 6 | G, A♭, B♭ |
Box 3 · frets 6–9
B♭ acoustic in box 3 runs from fret 6 to fret 9, 13 notes across 6 strings, from B♭ on the low E string at fret 6 up to C on the high e string at fret 8. The root falls on the low E string at fret 6, the D string at fret 8 and the high e string at fret 6.
Every note in this box, string by string
| String | Frets | Notes |
|---|---|---|
| 6 (E) | 6, 8 | B♭, C |
| 5 (A) | 7, 8 | E, F |
| 4 (D) | 6, 8 | A♭, B♭ |
| 3 (G) | 7, 9 | D, E |
| 2 (B) | 6, 8, 9 | F, G, A♭ |
| 1 (e) | 6, 8 | B♭, C |
Box 4 · frets 8–11
B♭ acoustic in box 4 runs from fret 8 to fret 11, 14 notes across 6 strings, from C on the low E string at fret 8 up to D on the high e string at fret 10. The root falls on the D string at fret 8 and the B string at fret 11.
Every note in this box, string by string
| String | Frets | Notes |
|---|---|---|
| 6 (E) | 8, 10 | C, D |
| 5 (A) | 8, 10, 11 | F, G, A♭ |
| 4 (D) | 8, 10 | B♭, C |
| 3 (G) | 9, 10 | E, F |
| 2 (B) | 8, 9, 11 | G, A♭, B♭ |
| 1 (e) | 8, 10 | C, D |
Box 5 · frets 10–13
B♭ acoustic in box 5 runs from fret 10 to fret 13, 16 notes across 6 strings, from D on the low E string at fret 10 up to F on the high e string at fret 13. The root falls on the A string at fret 13 and the B string at fret 11.
Every note in this box, string by string
| String | Frets | Notes |
|---|---|---|
| 6 (E) | 10, 12, 13 | D, E, F |
| 5 (A) | 10, 11, 13 | G, A♭, B♭ |
| 4 (D) | 10, 12 | C, D |
| 3 (G) | 10, 12, 13 | F, G, A♭ |
| 2 (B) | 11, 13 | B♭, C |
| 1 (e) | 10, 12, 13 | D, E, F |
Why it sounds like that
B♭ acoustic raises the fourth of B♭ mixolydian from E♭ to E. The scale is built 1, 2, 3, ♯4, 5, 6, ♭7. This creates a Lydian Dominant sound, also called Overtone or Lydian ♭7. Compare it with B♭ mixolydian to hear the altered fourth.
When to use it
Use B♭ acoustic over B♭7, B♭ major, or B♭ 5th chords in rock, fusion, and jazz. The ♯4 adds tension over dominant chords. Try it over B♭ major or B♭ 5th progressions.
Which position to practise
Practise Box 1 first. It keeps the root on the fifth string and covers frets 0–3 for quick access to the ♯4.
Common questions
What notes are in B♭ acoustic?
B♭, C, D, E, F, G, A♭. The raised fourth is E and the flat seventh is A♭. It is also spelled A♯ in enharmonic notation for the same sounding root.
Which chords fit B♭ acoustic?
B♭7, B♭ major, and B♭ 5th work well. The scale also fits over C major and F minor in progressions.
How is B♭ acoustic different from B♭ mixolydian?
B♭ acoustic has an E instead of E♭. That raised fourth creates the Lydian Dominant sound.