CadenzaD♭ thirteenth, suspended fourth
D♭13sus4
Also written C♯13sus4 · D♭13sus · Bmaj7/D♭
NotesD♭ · G♭ · A♭ · C♭ · E♭ · B♭
Formula1 · 4 · 5 · ♭7 · 9 · 13
C♭ is the key you know as B.
All its notes, from the root
A sus dominant with the 13th, heard as Bmaj7 over D♭: V of G♭ major with no 3rd at all — the gentlest dominant there is.
How pianists voice D♭13sus4
The same notes, laid out the way hands actually play them.
Bmaj7 over D♭ Slash chord
1 · ♭7 · 9 · 4 · 13 — a Bmaj7 in the right hand over D♭: ♭7, 9, 11 and 13 in one familiar shape.
Thirteenth, suspended fourth chords in every key
Every D♭ chord
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