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Amor (Ivan Lins) 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 A (descending minor third), A to E (descending perfect fourth), E to A# (ascending tritone), A# to C (ascending whole step), C to C (ascending unison), C to F (ascending perfect fourth), F to F (ascending unison), F to F (ascending unison), F to B (ascending tritone), B to B (ascending unison), B to E (ascending perfect fourth), E to E (ascending unison), E to D (descending whole step), D to A (descending perfect fourth), A to G# (descending half step), G# to G# (ascending unison), G# to C# (ascending perfect fourth), C# to D (ascending half step), D to G (ascending perfect fourth), G to C (ascending perfect fourth), C to A# (descending whole step), A# to C (ascending whole step), C to C (ascending unison), C to F (ascending perfect fourth), F to C (descending perfect fourth), C to D# (ascending minor third), D# to D# (ascending unison), D# to D (descending half step), D to G (ascending perfect fourth), G to G (ascending unison), G to G (ascending unison), G to G (ascending unison). A half-step bass movement creates a strong leading-tone pull that demands resolution. The predominantly stepwise bass motion creates smooth, connected voice leading. When the progression loops, the bass returns from G to C by perfect fourth.
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.