A Sunbonnet Blue in G

Sammy Fain / Irviung Kahal(1937)swing

A Sunbonnet Blue in G

Key of G

G major is the singer-songwriter's key. The open G, B, and D strings spell out the full G major triad with zero fretting. Add the open high E for a Gadd6 shimmer. Nearly every diatonic chord (Em, Am, C, D) has a comfortable open voicing. G is a beginner-level key on guitar because the open G, B, and D strings form a complete G major triad without fretting a single note, and the open low E adds a rich 6th color. Beginners will find this key approachable since most chords use open voicings with minimal stretching.

Voice Leading

The bass line moves through G to D (descending perfect fourth), D to B (descending minor third), B to E (ascending perfect fourth), E to C (descending major third), C to E (ascending major third), E to A (ascending perfect fourth), A to A (ascending unison), A to A (ascending unison), A to E (descending perfect fourth), E to F# (ascending whole step), F# to B (ascending perfect fourth), B to E (ascending perfect fourth), E to D (descending whole step). 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 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.

swing4/4 · 27 bars · Form: AB

Chords: G, D7, B7, Em, C, E7, Am, A7, Am7, Em6, F♯7, Bm, Em7, D.

Scales for Improvisation G bebop, G bebop major.

Diatonic chords: See all chords in the key of G