D♭ minor
The minor key on the tonic D♭. It has eight flats in its key signature, one of them a double flat, and the same notes as F♭ major. In practice it is replaced by the enharmonically equal C♯ minor, which has only four sharps.
- Tonic
- D♭
- Key signature
- eight flats (B♭, E♭, A♭, D♭, G♭, C♭, F♭ and a double flat on B)
- Tonic chord
- D♭–F♭–A♭
- Dominant
- A♭ major, A♭–C–E♭
- Leading tone
- C
- Relative key
- F♭ major
- Enharmonically equal
- C♯ minor (four sharps)
A key with eight flats
D♭ minor shares all its notes with F♭ major. Because the key signature grows in the order of the fifths, it needs the seven flats (B♭, E♭, A♭, D♭, G♭, C♭, F♭) and in addition a second flat before the B, a double flat: eight flats in all. In the notation of this glossary every accidental stands in front of the note, so that you can see the notes individually. Such a key signature practically never occurs in printed music; D♭ minor is a purely theoretical key.
Natural minor
The same notes as F♭ major, only the scale begins on the tonic of D♭ minor. The semitone steps lie between the second and third and between the fifth and sixth notes. The sixth note is B double flat, which sounds like A.
Harmonic minor
The seventh degree is raised by a semitone, here from C♭ to C. This creates a leading tone a semitone below the tonic, and between the sixth and seventh degrees lies the augmented second.
The cadence
The cadence in the audio example connects tonic, subdominant, dominant and tonic. The dominant in the minor cadence is a major chord because it contains the leading tone, which pulls upward to the tonic, see leading tone. Here it is the A♭ major chord with the leading tone C.
Enharmony and rarity
C♯ minor, with only four sharps, is enharmonically the same. Music in this region is therefore almost always written in C♯ minor, because the key signature stays manageable there. On the piano both spellings use the same keys. This is the enharmonic equivalent. D♭ minor nevertheless appears in theory: on the circle of fifths, when you follow the series of minor keys beyond A♭ minor with seven flats.
Common mistakes
- Forgetting the double flat: The sixth note is B double flat, not B.
- Confusing the tonic with the relative key: D♭ minor and F♭ major have the same notes but different tonics.
- Spelling the mode word with a capital: Write the note letter as a capital and the mode word in lowercase: “D♭ minor”.
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Related terms
MinorNatural minorHarmonic minorC♯ minorA♭ minorRelative keyCircle of fifthsAccidentalEnharmonic equivalence
Editor: Maik Krohm · reviewed on 3 October 2026
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