On Green Dolphin Street in A#
On Green Dolphin Street in A#
On Green Dolphin Street in A#: modal and tonal worlds collide — the opening tonic chord shifts unexpectedly before settling into conventional ii-V-I. Lydian over the static sections, Dorian and Bebop Major through the changes. Changes: A#Maj7 – A#m7 – C7/c – Cm7 – F7 – D#m7 – G#7 – C#Maj7 – Cm/c – Am7b5 – D7b9 – Gm7 – Gm/g – Em7b5 – A7 – Dm7 – G7.
On Green Dolphin Street in 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 A# (ascending unison), A# to C (ascending whole step), C to C (ascending unison), C to F (ascending perfect fourth), F to D# (descending whole step), D# to G# (ascending perfect fourth), G# to C# (ascending perfect fourth), C# to C (descending half step), C to A (descending minor third), A to D (ascending perfect fourth), D to G (ascending perfect fourth), G to G (ascending unison), G to E (descending minor third), E to A (ascending perfect fourth), A to D (ascending perfect fourth), D to G (ascending 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 G to A# by minor 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.