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Moon River 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 E (descending minor third), E to C (descending major third), C to F# (ascending tritone), F# to B (ascending perfect fourth), B to G (descending major third), G to C (ascending perfect fourth), C to C (ascending unison), C to E (ascending major third), E to F# (ascending whole step), F# to C# (descending perfect fourth), C# to E (ascending minor third), E to B (descending perfect fourth), B to A (descending whole step), A to A (ascending unison), A to A (ascending unison), A to D (ascending perfect fourth). 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.