Harlem Nocturne in A

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

Chord Diagrams — Harlem Nocturne in A (Guitar)

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Harlem Nocturne in A

Key of A

A major is a rock and blues cornerstone. The open A string delivers a strong root, while both E strings ring as the fifth. Classic A-D-E progressions practically play themselves with open cowboy chords. The open high E is the fifth, reinforcing power. A is a beginner-level key on guitar because the open A string is the root and the open E strings provide the fifth above and below, creating a massive low-end anchor. Beginners will find this key approachable since most chords use open voicings with minimal stretching.

Voice Leading

The bass line moves through A to A (ascending unison), A to D (ascending perfect fourth), D to D (ascending unison), D to D (ascending unison), D to F (ascending minor third), F to B (ascending tritone), B to E (ascending perfect fourth), E to A (ascending perfect fourth), A to G (descending whole step), G to C (ascending perfect fourth), C to G (descending perfect fourth), G to F (descending whole step), F to C (descending perfect fourth), C to F (ascending perfect fourth), F to D# (descending whole step), D# to C# (descending whole step), C# to B (descending whole step), B to A (descending whole step), A to D (ascending perfect fourth), D to G (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 G to A by whole step.

Scales for Improvisation

A 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, A Mixolydian adds the flat seventh for an authentic blues-rock edge.

swing4/4 · 29 bars · Form: ABC

Chords: AmMaj7, Am7, Dm, Dm7, DmMaj7, F6, B7, E7, Am6, G7, C7, Gm7, F7, Cm7, F9, D♯9, C♯9, B9, A9, D9, G9.

Scales for Improvisation A bebop minor, A bebop.

Diatonic chords: See all chords in the key of A