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Waltz For Debby in G#
Waltz for Debby in G#: Bill Evans's jazz waltz blossoms through lush upper-structure voicings and subtle harmonic extensions. Bebop Major and Lydian scales trace the major chord color — Dorian enriches the minor ii passages. Chords: Cm7 – F7b5 – F7 – Dm7 – G7 – G#11 – G#7 – C#Maj7 – F#9 – Fm – Fm7/Bb – A#7/a – C#dim7 – G#6/g – Bdim7 – A#m7 – D#9 – D#7b9 – G# – G#69 – Fm7 – D#7 – C7 – Cm7b5 – A#7 – A#m7b5 – D#7/Ab – G7/c – Em7 – CMaj7 – Bm7 – D#m7/Eb – A#9 – B7.
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 F (ascending perfect fourth), F to F (ascending unison), F to D (descending minor third), D to G (ascending perfect fourth), G to G# (ascending half step), G# to G# (ascending unison), G# to C# (ascending perfect fourth), C# to F# (ascending perfect fourth), F# to F (descending half step), F to F (ascending unison), F to A# (ascending perfect fourth), A# to C# (ascending minor third), C# to G# (descending perfect fourth), G# to B (ascending minor third), B to A# (descending half step), A# to D# (ascending perfect fourth), D# to D# (ascending unison), D# to G# (ascending perfect fourth), G# to G# (ascending unison), G# to F (descending minor third), F to D# (descending whole step), D# to C (descending minor third), C to C (ascending unison), C to A# (descending whole step), A# to A# (ascending unison), A# to D# (ascending perfect fourth), D# to G (ascending major third), G to E (descending minor third), E to C (descending major third), C to B (descending half step), B to D# (ascending major third), D# to A# (descending perfect fourth), A# to B (ascending half step). 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 B to C by half step.
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.