Afro Blue in Si

Afro Blue in Si

Afro Blue in B — Mongo Santamaria's Afro-Cuban gem in 6/8, transformed into a modal jazz statement by Coltrane. Dorian defines the rocking minor vamp; Harmonic Minor and Minor Pentatonic add blues depth. Changes: BMi69 – G7b9/Ab – F#7b9/G – A – G – BMi – C13 – BMi7.

Afro Blue in Si

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 B to G (descending major third), G to F# (descending half step), F# to A (ascending minor third), A to G (descending whole step), G to B (ascending major third), B to C (ascending half step), C to B (descending half 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 B to B by unison.

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.