Afro Blue in A#

Mongo Santamaria(1959)swing
Do Re MiC D E
A

Chord Diagrams — Afro Blue in A# (Guitar)

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Afro Blue 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 A# to C (ascending whole step), C to C# (ascending half step), C# to C (descending half step), C to G# (descending major third), G# to F# (descending whole step). A half-step bass movement creates a strong leading-tone pull that demands resolution. The predominantly stepwise bass motion creates smooth, connected voice leading. When the progression loops, the bass returns from F# to A# by major third.

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.

swing3/4 · 40 bars · Form: A

Chords: A♯m7, C7, C♯Maj7, Cm7, G♯, F♯.

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

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