[dasb]

Shouldn't it be D flat instead?

[ska]

Probably not? I think they are intentionally calling it the relative minor, not same note, which makes a kind of sense in the usual way punny names do (i.e. a bit of a stretch, but not ridiculous).

[Jap2-0]

B♭ isn't the relative minor of C♯? I think that'd be A♯ minor.

Edit: Actually B♭ minor is the enharmonic equivalent of A♯ minor. IE another case of things in music that are the same but aren't.

[ska]

I thought of adding the comment about enharmonics but it decided it would muddy the water further and edited it out. Should have left it in.

[jcpst]

Enharmonic in the context of 12-tone equal temperament!

slowly backs away

[Jap2-0]

Oh no you don't

And now I'm down the rabbit hole of reading about tuning systems again.

[OscarCunningham]

> We need a name that's witty at first but seems less funny each time you hear it.

[solresol]

I pictured Go = G.

If you want C# and G (a nasty tritone) together, then you need something else. Adding in a Bb will give a nice diminished chord.

[xaduha]

No, because then "be flat" part would be lost.