D♭ seventh, suspended fourth
D♭7sus4
Also written C♯7sus4 · D♭7sus · D♭sus7
C♭ is the key you know as B.
A dominant that has not decided: the 4th stands in for the 3rd. D♭7sus4 can resolve to D♭7 first — the classic sus-and-release — or go straight to G♭.
How pianists voice D♭7sus4
The same notes, laid out the way hands actually play them.
Open sus Two hands
1 · ♭7 · 4 · 5 — root and ♭7 in the left hand, 4th and 5th in the right: the sus sound with room between the hands.
D♭7sus4 inversions
The same 4 notes with a different one in the bass. Each inversion is written as a slash chord.
Root position D♭7sus4
Root at the bottom, stacked in 3rds: 1 · 4 · 5 · ♭7.
1st inversion D♭7sus4/G♭
G♭ (the 4) in the bass: 4 · 5 · ♭7 · 1.
2nd inversion D♭7sus4/A♭
A♭ (the 5) in the bass: 5 · ♭7 · 1 · 4.
3rd inversion D♭7sus4/C♭
C♭ (the ♭7) in the bass: ♭7 · 1 · 4 · 5.
Seventh, suspended fourth chords in every key
Every D♭ chord
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