Por una Cabeza in A

Por una Cabeza in A

Carlos Gardel y Alfredo Le Pera compusieron 'Por una Cabeza' en 1935 para la película 'Tango Bar'. Es el tango más reconocible del mundo no rioplatense: 'Scent of a Woman' (Al Pacino, 1992) lo inmortalizó en Hollywood y desde entonces es sinónimo de seducción y elegancia argentina. La melodía en Do mayor, con ese bandoneón que suspira, ha cruzado todos los idiomas y todas las pistas de baile del planeta.

Por una Cabeza 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 F# (ascending whole step), F# to D (descending major third), D to C# (descending half step), C# to B (descending whole step). 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 B to A by whole step.

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.