B Diminished Banjo (5-String) Scale
Banjo (5-String) scale — fretboard diagramAdvanced
B Diminished Scale — Notes and Intervals
The B Diminished scale, also known as the Octatonic scale and Messiaen's Mode of Limited Transposition #2, alternates whole and half steps to create an 8-note symmetrical structure. On Banjo (5-String), its notes are B, C#, D, E, F, G, G#, A#. Only three unique diminished scales exist — after three transpositions, the notes repeat. It is the definitive sound of film noir, thrillers, and psychological horror, used by composers from Stravinsky to Hans Zimmer to evoke dread, ambiguity, and mounting tension. Use it over dim7 chords and as a sophisticated tension device over dominant 7ths. Commonly used in Jazz, Film Scores, Classical, Metal. Notable players include Django Reinhardt, Joe Pass, Bela Bartok, Dream Theater. Use over dim7 chords and as a tension device over dominant 7ths. Each diminished scale works over 4 different root notes (every minor 3rd).
Notes: B, C#, D, E, F, G, G#, A#
Intervals: 1P, 2M, 3m, 4P, 5d, 6m, 6M, 7M
Degrees: 1 2 b3 4 5 b6 7 8
Formula: W-H-W-H-W-H-W-H
Number of notes: 8
Also known as: whole-half diminished
Musical Character
Alternates whole-half steps, creating an 8-note symmetric scale. Only 3 diminished scales exist — after 3 transpositions, you get the same notes. The definitive sound of suspense and film noir.
Genres & Notable Artists
Genres: Jazz, Film Scores, Classical, Metal
Notable players: Django Reinhardt, Joe Pass, Bela Bartok, Dream Theater
How to Use the B Diminished Scale
Use over dim7 chords and as a tension device over dominant 7ths. Each diminished scale works over 4 different root notes (every minor 3rd).
Origin & Background
The octatonic scale. Used extensively by Stravinsky, Bartok, and Messiaen. Also known as Messiaen's Mode of Limited Transposition #2.
How to Play B Diminished on Banjo (5-String)
Begin by locating B on your instrument and play through the 8 notes of the Diminished scale slowly, ensuring each note rings clearly before increasing speed.
The B Diminished scale contains 3 sharps (C#, G#, 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 100 BPM and play the B Diminished 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 Diminished scale come through clearly. This scale is especially effective in jazz contexts.
Banjo (5-String) Tips
Practice the B Diminished scale slowly and evenly on your instrument, focusing on tone quality for each of the 8 notes before building speed. Aim for a tense quality in your phrasing to match the natural character of this scale.
Related Scales
Chord Progressions Using This Scale
- I – ♯I°7 – ii – V (Diminished Cliché)Jazz / Soul — Nostalgic & Vintage
The B Diminished scale contains 8 notes (B, C#, D, E, F, G, G#, A#). Use the interactive fretboard above to explore this scale on Banjo (5-String) with different tunings and fret ranges.
CAGED Positions & Patterns for B Diminished
The B Diminished 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.
Explore B Diminished Further
- B Diminished arpeggio on Banjo (5-String)
- Browse chord progressions
- B Diminished on Guitar
- B Diminished on Ukulele
- B Diminished on Bass
- B Diminished on Piano