Dbm9b5

General info

Full name

Db Minor 9b5

Symbol

Dbm9b5

Root

Db

Quality

Minor 9b5

Chord notes

Functions & resolutions

Typical function in key

IVSubdominant (IV)Ab major

Stability / tension

Stable — can serve as major tonic

Most common resolutions

GbGb MajorAbAb MajorBbmBb Minor

Unstable degrees

4Gb

b5G

resolves inward to the 4th

4Gb

b7B

resolves down to the resolution tonic

Main resolution

Dbm9b5source

AbAb Major

Major chord Db is a stable tonic. As tonic it doesn't require resolution, but in a progression context typically moves to IV or V.

Other resolutions

Dbm9b5source

Deceptive resolution

BbmBb Minor

As the V degree, a major chord can defy expectations by moving to vi instead of I (deceptive cadence).

Dbm9b5source

Modal resolution

BB Major

In modal context, a major chord can freely move to bVII, bIII, or bVI — characteristic of Mixolydian mode.

Dbm9b5source

Jazz reharmonization

Dbmaj7Db Major 7

In jazz, a major chord is enriched to maj7, 6/9, or add9 and can smoothly transition into a ii-V of another key (modulation).

Dbm9b5source

Functional resolution

AbAb Major

As the IV degree (subdominant), a major chord can resolve to V or directly to I (plagal cadence).

Features

Character

Half-diminished, with an added 9th

Characteristic interval

Diminished 5th (b5), 9th

Description

The minor 3rd, diminished 5th, and minor 7th form a half-diminished seventh chord; the major 9th adds a diatonic extension. The b5 dissonance preserves the instability of the core.

Application

• ii-V in minor (extended)
• Modern jazz
• Substitute for m7b5 with ninth

Voicing & structure

Harmony

Compatible scales

All chord tones are contained in these scales — use them for improvisation.