Imagination in A#

Jimmy Van Heusel / Johnny Burke(1939)swing
Do Re MiC D E
A
B
G7♭9♯5
F7♭9♯5
G7♭9♯5
Cm/F

Chord Diagrams — Imagination in A# (Guitar)

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FingerNoteDegree

Imagination in A#

Key of A#

A# (Bb) major requires barre chords rooted at fret 1 on the A string or fret 6 on the E string. Despite the barre demands, it is a common key in funk, New Orleans R&B, and brass band music. The open D string can ring as the major third for added color. A# is a intermediate-level key on guitar because the open D string is the major 3rd of Bb, adding a bright color if allowed to ring. Expect to rely on barre chords throughout, which builds hand strength and unlocks the entire fretboard.

Voice Leading

The bass line moves through B to A# (descending half step), A# to F (descending perfect fourth), F to C (descending perfect fourth), C to F (ascending perfect fourth), F to G (ascending whole step), G to G (ascending unison), G to D (descending perfect fourth), D to A# (descending major third), A# to D# (ascending perfect fourth), D# to A (ascending tritone), A to E (descending perfect fourth), E to F (ascending half step), F to C (descending perfect fourth), C to G (descending perfect fourth), G to F (descending whole step), F to D (descending minor third), D to F (ascending minor third), F to C (descending perfect fourth). 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 C to B by half 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 · 31 bars · Form: AB

Chords: Bdim7, A♯, F7, Cm, Fm, G7♭9, G7♭9♯5, Dm, A♯7, D♯, A7, Em, F, C7, Gm, F7♭9♯5, D7♯9, F7♭9, Cm/F.

Scales for Improvisation A# bebop, A# bebop major.

Diatonic chords: See all chords in the key of A#