Todo Cambia in A

Todo Cambia in A

Julio Numhauser compuso 'Todo Cambia' en 1982; Mercedes Sosa la grabó en 1986 y la llevó a ser un himno de la nueva canción latinoamericana. 'Cambia todo cambia' —la filosofía del cambio continuo como única constante— resonó en toda América Latina durante las transiciones democráticas de los 80s. La voz de la Negra Sosa convirtió esta canción en un acto de resistencia y esperanza.

Todo Cambia in 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 E (descending perfect fourth), E to D (descending whole step), D to B (descending minor third), B to F# (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 F# to A by minor 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. Over dominant seventh chords, A Mixolydian adds the flat seventh for an authentic blues-rock edge.