CadenzaC thirteenth, suspended fourth
C13sus4
Also written C13sus · B♭maj7/C
NotesC · F · G · B♭ · D · A
Formula1 · 4 · 5 · ♭7 · 9 · 13
All its notes, from the root
A sus dominant with the 13th, heard as B♭maj7 over C: V of F major with no 3rd at all — the gentlest dominant there is.
How pianists voice C13sus4
The same notes, laid out the way hands actually play them.
B♭maj7 over C Slash chord
1 · ♭7 · 9 · 4 · 13 — a B♭maj7 in the right hand over C: ♭7, 9, 11 and 13 in one familiar shape.
Thirteenth, suspended fourth chords in every key
Every C chord
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