Do Re MiC D E

I'm An Errand Boy For Rhythm

Nat King Cole(1954)4/4swing

Chord Diagrams — I'm An Errand Boy For Rhythm in B (Guitar)

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I'm An Errand Boy For Rhythm 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 G# to B (ascending minor third), B to F# (descending perfect fourth), F# to C# (descending perfect fourth), C# to G# (descending perfect fourth), G# to D# (descending perfect fourth), D# to C# (descending whole step), C# to D# (ascending whole step), D# to F# (ascending minor third), F# to C# (descending perfect fourth), C# to A# (descending minor third), A# to A (descending half step). A half-step bass movement creates a strong leading-tone pull that demands resolution. 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 G# by half 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 · 27 bars · Form: AB

Chords: G♯7, B6, F♯7, C♯9, G♯7♯5, D♯m, C♯m7, D♯7, F♯13, C♯7, A♯7, A7.

Scales for Improvisation B bebop, B bebop major.

Diatonic chords: See all chords in the key of B