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Olhos Nos Olhos in A
Key of A
A major is a rock and blues cornerstone. The open A string delivers a strong root, while both E strings ring as the fifth. Classic A-D-E progressions practically play themselves with open cowboy chords. The open high E is the fifth, reinforcing power. A is a beginner-level key on guitar because the open A string is the root and the open E strings provide the fifth above and below, creating a massive low-end anchor. Beginners will find this key approachable since most chords use open voicings with minimal stretching.
Voice Leading
The bass line moves through F# to F# (ascending unison), F# to F# (ascending unison), F# to B (ascending perfect fourth), B to B (ascending unison), B to G# (descending minor third), G# to C# (ascending perfect fourth), C# to A (descending major third), A to B (ascending whole step), B to C (ascending half step), C to C# (ascending half step), C# to A (descending major third), A to A (ascending unison), A to D (ascending perfect fourth), D to D (ascending unison), D to C# (descending half step), C# to B (descending whole step), B to E (ascending perfect fourth), E to E (ascending unison), E to F# (ascending whole step), F# to F# (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 F# to F# by unison.
Scales for Improvisation
A 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, A Mixolydian adds the flat seventh for an authentic blues-rock edge.