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C'est Si Bon 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 D to B (descending minor third), B to C# (ascending whole step), C# to F# (ascending perfect fourth), F# to F# (ascending unison), F# to B (ascending perfect fourth), B to G# (descending minor third), G# to D# (descending perfect fourth), D# to A# (descending perfect fourth), A# to A (descending half step), A to F# (descending minor third), F# to G (ascending half step), G to B (ascending major third), B to D (ascending minor third), D to A (descending perfect fourth), A to E (descending perfect fourth), E to G (ascending minor third), G to G (ascending unison), G to G# (ascending half step), G# to C# (ascending perfect fourth), C# to C# (ascending unison), C# to D (ascending half step), D to C# (descending half step), C# to D# (ascending whole step), D# to G# (ascending perfect fourth), G# to E (descending major third), E to G (ascending minor third). 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 D by perfect fourth.
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.