F# Locrian Bass Scale
Bass scale — fretboard diagram
F# Locrian Scale — Notes and Intervals
The F# Locrian scale is the seventh and most unstable mode of the major scale. On Bass, the notes are F#, G, A, B, C, D, E. It sounds highly dissonant and unresolved, as its home chord is a diminished triad. While rare as a primary key, it is a crucial technical tool for jazz musicians improvising over half-diminished chords in tension-heavy passages. The diatonic chords of F# Locrian are F#m7b5, GMaj7, Am7, Bm7, CMaj7, D7, Em7. Commonly used in Jazz, Metal, Experimental, Avant-Garde. Notable players include John Coltrane, Meshuggah, Dream Theater. Use over m7b5 (half-diminished) chords. Essential for jazz ii-V-i in minor keys where the ii chord is half-diminished.
Notes: F#, G, A, B, C, D, E
Intervals: 1P, 2m, 3m, 4P, 5d, 6m, 7m
Degrees: 1 b2 b3 4 5 b6 b7
Formula: H-W-W-H-W-W-W
Number of notes: 7
Diatonic Chords
F♯m7♭5 — GMaj7 — Am7 — Bm7 — CMaj7 — D7 — Em7
How to Play F# Locrian on Bass
On bass, locate F# on the E string at fret 2. Use a one-finger-per-fret approach starting from the root and span two to three strings. Keep your fretting hand relaxed and practice shifting between positions cleanly.
The F# Locrian scale contains 1 sharp (F#). Its relative major is A major, which shares the same key signature.
Practice Routine
Set a metronome to 80 BPM and play the F# Locrian scale in groups of four notes, shifting the starting note each repetition. This builds muscle memory across the entire scale range. After a week, try improvising short 4-bar phrases using only these notes.
Try these progressions with the F# Locrian scale: F#m7b5 - Bm7 - CMaj7 - F#m7b5 (I-IV-V-I) or F#m7b5 - GMaj7 - Bm7 - CMaj7 for a more stepwise movement.
Bass Tips
Practice the F# Locrian scale on bass using only your index and ring fingers for a two-finger-per-string approach, then switch to one-finger-per-fret. Both techniques are essential for different musical situations.
The F# Locrian scale contains 7 notes (F#, G, A, B, C, D, E). Use the interactive fretboard above to explore this scale on Bass with different tunings and fret ranges.
CAGED Positions & Patterns for F# Locrian
The F# Locrian scale can be played in 5 CAGED positions across the fretboard, each based on an open chord shape (C, A, G, E, D). As a 7-note scale, it also lends itself to 3-notes-per-string (3NPS) patterns that facilitate legato playing and diagonal shifting. Use the pattern selector above to isolate each position.