through the looking glass [12-22 scales]

Paul Erlich wrote TD 689:

> Right -- and these chords are precisely (the 22-tET approximations
> of)
> the usual 7-limit otonal and utonal tetrads -- but to always work,
> the
> mirror would have to either be in the middle of "D" or in the middle
> of "Ab" -- otherwise the keyboard itself would no longer look the
> same
> as before you put the mirror there.
> >

Gotcha. And it's a pretty "cool" way to look at the keyboard. I
somehow never thought about the "mirror" symmetry!

> I meant the root is one color and all the other notes
> are the other color.

For these chords I hear a STRIKING difference between the 12-22 scale
and the 12t-ET. Virtually NO beating the in 12-22. For me, these
chords had as pronounced a difference as the dominant sevenths... Is
this the way it "should" be??

__________ _____ ___ ___ _
Joseph Pehrson