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Sister Moon in F
Key of 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 A# (ascending perfect fourth), A# to A# (ascending unison), A# to C (ascending whole step), C to C# (ascending half step), C# to D (ascending half step), D to F (ascending minor third), F to C (descending perfect fourth), C to D# (ascending minor third), D# to F (ascending whole step), F to C (descending perfect fourth), C to C (ascending unison), C to A (descending minor third), A to A (ascending unison), A to A (ascending unison), A to A (ascending unison), A to D (ascending perfect fourth), D to E (ascending whole step), E to F (ascending half step), F to G (ascending whole step), G to C# (ascending tritone). 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 C# to F by major third.
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.