Always in A#

Irving Berlin(1925)swing

Always 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 F (descending perfect fourth), F to G (ascending whole step), G to C (ascending perfect fourth), C to A# (descending whole step), A# to D (ascending major third), D to B (descending minor third), B to E (ascending perfect fourth), E to A (ascending perfect fourth), A to F (descending major third), F to A# (ascending perfect fourth), A# to G# (descending whole step), G# to D# (descending perfect fourth), D# to C (descending minor third). 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 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.

swing3/4 · 32 bars · Form: A

Chords: A♯, F7, G7, Cm7, A♯6, D, Bm7, Em7, A7, F, A♯7, G♯7, D♯Maj7, C7.

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

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