I Left My Heart In San Francisco in Re

I Left My Heart In San Francisco in Re

I Left My Heart In San Francisco in Re

D major is one of guitar's most resonant keys. The open D string acts as a droning root, and the open A string provides the fifth. This gives D-based strumming a wide, ringing quality that flatpicks and fingerpicks love. D is a beginner-level key on guitar because the open D and A strings provide a powerful bass foundation, and the open high E is the 2nd scale degree adding brightness. Beginners will find this key approachable since most chords use open voicings with minimal stretching.

Voice Leading

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

Scales for Improvisation

D 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, D Mixolydian adds the flat seventh for an authentic blues-rock edge.