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Summer Of '69 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 A to A (ascending unison), A to E (descending perfect fourth), E to E (ascending unison), E to F# (ascending whole step), F# to E (descending whole step), E to A (ascending perfect fourth), A to D (ascending perfect fourth), D to A (descending perfect fourth), A to E (descending perfect fourth), E to C (descending major third), C to F (ascending perfect fourth), F to G (ascending whole step), G to F (descending whole step). 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 F to A by major third.
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. Try the major blues scale — adding the flat 3rd as a passing chromatic note gives bends and slides an expressive, soulful quality.