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Afro Blue in C
Afro Blue in C — Mongo Santamaria's Afro-Cuban gem in 6/8, transformed into a modal jazz statement by Coltrane. Dorian defines the rocking minor vamp; Harmonic Minor and Minor Pentatonic add blues depth. Changes: Cm7 – G#7#9/D# – G7#9/D – A# – G#.
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 G# (descending major third), G# to G (descending half step), G to A# (ascending minor third), A# to G# (descending whole step). A half-step bass movement creates a strong leading-tone pull that demands resolution. The mix of stepwise and leap motion balances smoothness with harmonic drive. When the progression loops, the bass returns from G# to C by major third.
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. Over dominant seventh chords, C Mixolydian adds the flat seventh for an authentic blues-rock edge.