Explore scales · Bass
B♭ harmonic minor scale on bass guitar
B♭ harmonic minor is B♭, C, D♭, E♭, F, G♭, A. Box 2 places the root on string 4, fret 6 for a mid-neck anchor.
How it is built
Formula 1, 2, ♭3, 4, 5, ♭6, 7
How do you play the B♭ harmonic minor scale on bass?
B♭ harmonic minor in box 1 runs from fret 1 to fret 4, 10 notes across 4 strings, from F on the E string at fret 1 up to B♭ on the G 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 |
|---|---|---|
| 4 (E) | 1, 2 | F, G♭ |
| 3 (A) | 1, 3, 4 | B♭, C, D♭ |
| 2 (D) | 1, 3, 4 | E♭, F, G♭ |
| 1 (G) | 2, 3 | A, B♭ |
Box 2 · frets 6–9
B♭ harmonic minor in box 2 runs from fret 6 to fret 9, 10 notes across 4 strings, from B♭ on the E string at fret 6 up to E♭ on the G string at fret 8. The root falls on the E string at fret 6 and the D string at fret 8.
Every note in this box, string by string
| String | Frets | Notes |
|---|---|---|
| 4 (E) | 6, 8, 9 | B♭, C, D♭ |
| 3 (A) | 6, 8, 9 | E♭, F, G♭ |
| 2 (D) | 7, 8 | A, B♭ |
| 1 (G) | 6, 8 | D♭, E♭ |
Box 3 · frets 8–11
B♭ harmonic minor in box 3 runs from fret 8 to fret 11, 11 notes across 4 strings, from C on the E string at fret 8 up to G♭ on the G string at fret 11. The root falls on the D string at fret 8.
Every note in this box, string by string
| String | Frets | Notes |
|---|---|---|
| 4 (E) | 8, 9, 11 | C, D♭, E♭ |
| 3 (A) | 8, 9 | F, G♭ |
| 2 (D) | 8, 10, 11 | B♭, C, D♭ |
| 1 (G) | 8, 10, 11 | E♭, F, G♭ |
Box 4 · frets 11–14
B♭ harmonic minor in box 4 runs from fret 11 to fret 14, 9 notes across 4 strings, from E♭ on the E string at fret 11 up to A on the G string at fret 14. The root falls on the A string at fret 13.
Every note in this box, string by string
| String | Frets | Notes |
|---|---|---|
| 4 (E) | 11, 13, 14 | E♭, F, G♭ |
| 3 (A) | 12, 13 | A, B♭ |
| 2 (D) | 11, 13 | D♭, E♭ |
| 1 (G) | 11, 14 | G♭, A |
Why it sounds like that
Start with B♭ natural minor and raise the seventh from A♭ to A. The step pattern becomes W, H, W, W, H, 1½, H. That 1½-step between G♭ and A gives the scale its distinctive sound. See B♭ natural minor for the unraised version.
When to use it
Use B♭ harmonic minor over B♭ minor progressions that include F major, like B♭m–F–B♭m. It suits classical and Middle Eastern styles. Try it with B♭ minor and F major.
Which position to practise
Practise Box 2 first. It covers frets 6–9 and keeps the root on string 4, fret 6, with the raised seventh on string 2, fret 8.
Common questions
What notes are in B♭ harmonic minor?
B♭, C, D♭, E♭, F, G♭, and A. The raised seventh A distinguishes it from natural minor. This creates a leading tone to the tonic B♭. It is also spelled A♯ in enharmonic notation for the same sounding root.
Which chords fit B♭ harmonic minor?
The tonic chord is B♭ minor, and the dominant is F major. The seventh degree forms A diminished. Common progressions include B♭m–F–B♭m.
What is the step pattern for B♭ harmonic minor?
The step pattern is W, H, W, W, H, 1½, H. The 1½-step between G♭ and A creates the augmented-second pull. This pattern defines the harmonic minor sound.