Harlem Nocturne in B

Earle Hagen / Dick Rogers(1939)swing
Do Re MiC D E
A
B
C

Chord Diagrams — Harlem Nocturne in B (Guitar)

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Harlem Nocturne in B

Key of B

B major mixes barre and open elements. The B chord itself is a barre at fret 2, but E and A are comfortable open chords forming the IV and V. The open B string rings as the root, allowing creative drone-based arrangements. B is a intermediate-level key on guitar because the open B string rings as the root and the open E strings provide the 4th — useful for sus4 voicings and drone effects. This key mixes open and barre shapes, making it a good intermediate challenge that builds fretboard fluency.

Voice Leading

The bass line moves through B to B (ascending unison), B to E (ascending perfect fourth), E to E (ascending unison), E to E (ascending unison), E to G (ascending minor third), G to C# (ascending tritone), C# to F# (ascending perfect fourth), F# to B (ascending perfect fourth), B to A (descending whole step), A to D (ascending perfect fourth), D to A (descending perfect fourth), A to G (descending whole step), G to D (descending perfect fourth), D to G (ascending perfect fourth), G to F (descending whole step), F to D# (descending whole step), D# to C# (descending whole step), C# to B (descending whole step), B to E (ascending perfect fourth), E to A (ascending perfect fourth). The root motion by larger intervals (fourths and fifths) gives each chord change a strong, decisive character. When the progression loops, the bass returns from A to B by whole step.

Scales for Improvisation

B major pentatonic works because every note is either a chord tone or a safe passing tone — there are no avoid notes. For soloing, this means you can play freely without clashing. Over dominant seventh chords, B Mixolydian adds the flat seventh for an authentic blues-rock edge.

swing4/4 · 29 bars · Form: ABC

Chords: BmMaj7, Bm7, Em, Em7, EmMaj7, G6, C♯7, F♯7, Bm6, A7, D7, Am7, G7, Dm7, G9, F9, D♯9, C♯9, B9, E9, A9.

Scales for Improvisation B bebop minor, B bebop.

Diatonic chords: See all chords in the key of B