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Your song in C
Key of C
With no sharps or flats, C major is the theoretical home base on guitar. The open G, B, and high E strings all belong to the C major chord, creating natural sustain. C is a beginner-level key on guitar because the open B and high E strings ring within the scale, and every basic chord uses familiar open shapes. Beginners will find this key approachable since most chords use open voicings with minimal stretching.
Voice Leading
The bass line moves through C to F (ascending perfect fourth), F to G (ascending whole step), G to F (descending whole step), F to G (ascending whole step), G to E (descending minor third), E to A (ascending perfect fourth), A to A (ascending unison), A to A (ascending unison), A to F (descending major third), F to C (descending perfect fourth), C to G (descending perfect fourth), G to E (descending minor third), E to D (descending whole step), D to G (ascending perfect fourth), G to F (descending whole step), F to C (descending 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 C to C by unison.
Scales for Improvisation
C 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. Use the Lydian mode (raised 4th) over the IV chord for a dreamy, floating quality that lifts the harmony.