F♭ Whole-Half Diminished

Note: This scale is rarely used in practice. The e-whole-half-diminished is more commonly used and is enharmonically equivalent.

The F♭ whole-half-diminished scale is an eight-note symmetrical scale that alternates whole steps and half steps, creating a pattern essential for jazz improvisation over dominant 7th chords with altered tensions. Also known as the auxiliary diminished scale or diminished dominant scale, this octatonic scale shares its symmetrical structure with the F♭ half-whole-diminished scale but serves a distinctly different harmonic function. Jazz pianists use this scale extensively alongside the F♭ bebop dominant scale and F♭ Mixolydian mode to create tension, chromaticism, and sophisticated voice leading over F♭ dominant seventh chords in bebop, post-bop, and modern jazz contexts.

Symbol: F♭ W-H dim
Key: f flat
Scale Type: whole half diminished
Cardinality: octatonic
Number of Notes: 9
Notes: F♭, G♭, A𝄫, B𝄫, C𝄫, D𝄫, E𝄫, F𝄫, F♭
Intervals from Root: M2, m3, P4, TT, m6, M6, M7

Formula, Intervals, and Symmetrical Structure

The F♭ whole-half-diminished scale follows a precise interval formula of W-H-W-H-W-H-W-H, creating an eight-note octatonic structure with complete symmetry. From the root F♭, the scale contains altered tensions ideal for sophisticated dominant chord voicings and improvisational lines.

Application in Jazz Improvisation Over Dominant 7th Chords

The F♭ whole-half-diminished scale serves as a primary improvisational tool for jazz pianists navigating F♭ dominant 7th chords with altered tensions, creating sophisticated harmonic language in bebop and modern jazz.

Practice Techniques and Fingering Strategies

Effective piano practice requires systematic fingering patterns. Practice over sustained F♭ dominant 7th chords, emphasizing chord tones versus alterations to develop harmonic sensitivity.

Relationships to Other Scales and Harmonic Context

The F♭ whole-half-diminished scale shares a profound relationship with the F♭ half-whole-diminished scale, and relates to F♭ Mixolydian and F♭ bebop dominant.