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Boo Boo's Birthday

Monk Thelonious4/4medium-swing

Chord Diagrams — Boo Boo's Birthday in G# (Guitar)

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Boo Boo's Birthday in G#

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 G# to G (descending half step), G to C (ascending perfect fourth), C to C# (ascending half step), C# to C (descending half step), C to B (descending half step), B to A# (descending half step), A# to A (descending half step), A to A (ascending unison), A to D# (ascending tritone), D# to D (descending half step), D to C# (descending half step), C# to C# (ascending unison). 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 C# to G# by perfect fourth.

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.

medium-swing4/4 · 21 bars · Form: AB

Chords: G♯maj7, G7, C7♭9, C♯7♯11, C7♯11, B7♯11, A♯7♯11, Amaj7♯11, A7, D♯m7, D7, C♯maj7, C♯maj7♯11.

Scales for Improvisation G# bebop, G# bebop major.

Diatonic chords: See all chords in the key of G#