Obsesión in F

Obsesión in F

Pedro Flores, el puertorriqueño que redefinió el bolero, compuso 'Obsesión' en 1934. Es uno de los grandes boleros del repertorio hispanoamericano: 'por alto esté el cielo en el mundo, por hondo que sea el mar profundo'. Trío Los Panchos, Luis Miguel y cientos de intérpretes la han grabado. El Bbmaj7-Bbm del puente — el recurso de la sombra modal — da a este bolero en Fa mayor su dimensión de obsesión verdadera.

Obsesión in F

F major is the gateway to barre chords. While F itself requires a full barre at fret 1, the remaining diatonic chords (C, Dm, Am, G, Bb) mix open and barre shapes. The open high E acts as Fmaj7's seventh, adding unexpected richness. F is a intermediate-level key on guitar because the open high E string is the major seventh of F, creating a lush Fmaj7 resonance even in basic shapes, but the F barre chord itself is the first big hurdle for beginners. This key mixes open and barre shapes, making it a good intermediate challenge that builds fretboard fluency.

Voice Leading

The bass line moves through F to G (ascending whole step), G to C (ascending perfect fourth), C to A (descending minor third), A to D (ascending perfect fourth), D to A# (descending major third), A# to A# (ascending unison). 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 A# to F by perfect fourth.

Scales for Improvisation

F 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, F Mixolydian adds the flat seventh for an authentic blues-rock edge.