Playable, correctly spelled, and not how the chord is normally voiced. Right now this is the shapes that put a ninth, eleventh or thirteenth below the root.
Bb69 is Bb, D, F, G and C — Bb6 with the ninth added as well.
It sounds wide and entirely at rest. The modern way to voice a tonic when a triad is too bare and a maj7 too pointed.
Tonic — it commits to nothing.

| Bb | D | F | G | C |
|---|---|---|---|---|
| 1 | 3 | 5 | 6 | 9 |
Also written Bb6/9, Bb6add9 or Bb six nine. The same chord either way; which spelling you meet depends on who wrote the chart.
Five notes and four fingers, so something has to go. Keep D (it fixes the quality) and G and C (what the symbol is about). Let F and Bb go, in that order — a perfect fifth says nothing the root has not, and in a band the bass has the root.
Play Bb69 as a shell — root, third and seventh — and the spare string takes the #11 (E).
All 8 common shapes as fret numbers, lowest string first. Hover or tap one to see it drawn.
How you get to it. The turn that lands on Bb69 is Cm7 to F7 — the ii and the V of Bb — and F7 shares its third and seventh with Cm7, so the hand barely moves between them.
In which keys. Every note of Bb69 belongs to C minor (the ♭VII), D minor (the ♭VI), Eb major (the V), F major (the IV), G minor (the ♭III) and Bb major (the I).
Bb69 is every note of the Bb major pentatonic, and nothing else. It also sits inside Bb major, Bb mixolydian, Bb lydian and Bb lydian dominant.
Each of those is a page: the scale across the neck, and the chords it harmonises into — which is where Bb69 sits in it. Every scale.
Change one note of Bb69 and you have Bbmaj9 (the sixth becomes the major seventh), Bbmaj13 (add the major seventh), Bbm69 (the major third becomes the minor third), Bbadd9 (drop the sixth), Bb6 (drop the ninth) or Bb9 (the sixth becomes the flat seventh).
Bb69 is a major chord — root, major third, fifth. Major chords on every root.
The common shapes and the derived voicings come from different places, and both are explained in how this site is built.
Shows each chord the way this style would voice it, and marks which of its alternatives belong to the idiom.