9716 / 18210 · Workshop 80 — Harmonic Ambiguity and Delayed Identity: Sus Chords, No-3rd Voicings, Slash Chords, Pedals, and Letting the Listener Discover the Harmony← prev⊞ allnext →
80.36Level 18 — B♭/C
Bass:
C.
RH:
B♭-D-F.
Functions:
♭7,9,11.
That's essentially:
C9sus-type color.
But visually/finger-wise:
B♭ triad over C.
This is a useful upper-structure shortcut.