Do Re MiC D E

Let's Cool One

Monk Thelonious4/4medium-swing

Chord Diagrams — Let's Cool One in G (Guitar)

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Let's Cool One 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 A (ascending whole step), A to D (ascending perfect fourth), D to G (ascending perfect fourth), G to F# (descending half step), F# to F (descending half step), F to B (ascending tritone), B to E (ascending perfect fourth), E to A (ascending perfect fourth), A to G (descending whole step), G to D (descending perfect fourth), D to G (ascending perfect fourth), G to C (ascending perfect fourth), C to D (ascending whole 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 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.

medium-swing4/4 · 32 bars · Form: ABA

Chords: Gmaj7, Am7, D7, Gmaj, F♯7, F7, B7, E7♭9♯11, A7, G6, Dm7, G7, Cmaj7, D7sus4.

Scales for Improvisation G bebop, G bebop major.

Diatonic chords: See all chords in the key of G