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One Note Samba in G#
One Note Samba in G#: Jobim's bossa nova gem oscillates between two adjacent chords with characteristic Lydian Dominant flavor. Dorian fits the minor moments while Major Pentatonic keeps the melodic lines light and playful. Chords: Cm7 – B7 – A#m7 – A7#11 – D#m7 – G#7 – C#maj7 – F#7 – G#6 – C#m7 – Bmaj7 – Bm7 – E7 – Amaj7 – A#m7b5 – D#7.
Key of G#
G# major (or Ab) lives at fret 4 on the low E string. All chords require barre technique, making it less common in guitar-centric songwriting but standard in piano-driven pop. Guitarists often use a capo to access friendlier shapes. G# is a intermediate-advanced-level key on guitar because the open G string is a half step below the root, creating dissonance — avoid letting it ring. Expect to rely on barre chords throughout, which builds hand strength and unlocks the entire fretboard.
Voice Leading
The bass line moves through C to B (descending half step), B to A# (descending half step), A# to A (descending half step), A to D# (ascending tritone), D# to G# (ascending perfect fourth), G# to C# (ascending perfect fourth), C# to F# (ascending perfect fourth), F# to G# (ascending whole step), G# to C# (ascending perfect fourth), C# to B (descending whole step), B to B (ascending unison), B to E (ascending perfect fourth), E to A (ascending perfect fourth), A to A# (ascending half step), A# to D# (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 D# to C by minor third.
Scales for Improvisation
G# 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, G# Mixolydian adds the flat seventh for an authentic blues-rock edge.