Setembro

Setembro in B

Key of B

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