B Messiaen's Mode #4 Bass Scale
Bass scale — fretboard diagram
B Messiaen's Mode #4 Scale — Notes and Intervals
The B Messiaen's Mode #4 scale is a symmetrical scale designed to have no single tonic. On Bass, the notes are B, C, C#, E, F, F#, G, A#. Messiaen used it to create what he called the charm of impossibilities, evoking a sense of spiritual wonder where the listener loses their sense of direction. Commonly used in Contemporary Classical, Film Scores, Experimental. Notable players include Olivier Messiaen. Use for avant-garde composition and film scoring where traditional tonal direction should dissolve.
Notes: B, C, C#, E, F, F#, G, A#
Intervals: 1P, 2m, 2M, 4P, 4A, 5P, 6m, 7M
Degrees: 1 b2 3 4 #5 6 b7 8
Formula: H-H-WH-H-H-H-WH-H
Number of notes: 8
How to Play B Messiaen's Mode #4 on Bass
On bass, locate B on the A 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 B Messiaen's Mode #4 scale contains 3 sharps (C#, F#, A#). This scale does not follow a traditional major or minor key signature, so reading from sheet music may require accidentals.
Practice Routine
Set a metronome to 80 BPM and play the B Messiaen's Mode #4 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.
Experiment with simple two-chord vamps rooted on B to let the characteristic intervals of the Messiaen's Mode #4 scale come through clearly.
Bass Tips
Practice the B Messiaen's Mode #4 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 B Messiaen's Mode #4 scale contains 8 notes (B, C, C#, E, F, F#, G, A#). Use the interactive fretboard above to explore this scale on Bass with different tunings and fret ranges.
CAGED Positions & Patterns for B Messiaen's Mode #4
The B Messiaen's Mode #4 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 8-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.