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At Long Last Love in F#
Key of F#
F# major pushes guitarists into full barre territory at fret 2 and beyond. No open chords exist naturally, but the key rewards advanced players with dark, powerful voicings. Common in metal and progressive rock where low tunings bring it closer to standard pitch. F# is a intermediate-advanced-level key on guitar because the open B string is the 4th scale degree and the open high E is the minor 7th, both usable as color tones. Expect to rely on barre chords throughout, which builds hand strength and unlocks the entire fretboard.
Voice Leading
The bass line moves through F# to D# (descending minor third), D# to G# (ascending perfect fourth), G# to C# (ascending perfect fourth), C# to C# (ascending unison), C# to C# (ascending unison), C# to B (descending whole step), B to A# (descending half step), A# to D# (ascending perfect fourth), D# to C# (descending whole step), C# to D# (ascending whole step), D# to D# (ascending unison), D# to D# (ascending unison), D# to B (descending major third), B to F (ascending tritone), F to B (ascending tritone), B to D# (ascending major third), D# to C# (descending whole step), C# to F# (ascending perfect fourth), F# to E (descending whole step), E to C# (descending minor third), C# to A (descending major third), A to F# (descending minor third), F# to F# (ascending unison), F# to B (ascending perfect fourth), B to C (ascending half step), C to E (ascending major third), E to B (descending perfect fourth). A half-step bass movement creates a strong leading-tone pull that demands resolution. 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 B 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.