Scale morphing

Paul said :

>
> What intrigues me is the idea of a multi-movement work, in which a
> basic 10-tone motif is presented in a different scale in each
> movement (with each movement using the appropriate tuning) . . .
>

I had a similar (or completely different) idea about a piece using
a single scale which would have the scales tuning tuning morphed
during the course of a piece. As a discrete example for doing this,
one could morph between [2,5] in 29 and 31 ED2 by using the product
899 ED2. L and s would be swept through

L=145 s=87 (31)
147 82
149 77
151 72
153 67
155 62 (29).

Determining the interval sizes continuosly is more difficult by
hand but software could do it easily. This looks more like a
machine playable piece as well, although folks who can navigate
cents notation could deal with it.

Bob Valentine

In-Reply-To: <200107311152.OAA25080@ius065.iil.intel.com>
Bob Valentine wrote:

> I had a similar (or completely different) idea about a piece using
> a single scale which would have the scales tuning tuning morphed
> during the course of a piece. As a discrete example for doing this,
> one could morph between [2,5] in 29 and 31 ED2 by using the product
> 899 ED2. L and s would be swept through

Or a simpler case, a piece in meantone that varied between 12- and
19-ED2?

That's the kind of thing I do in
<http://x31eq.com/magicpump.mp3>. It uses my "magic" 9-limit
temperament, and the tunings of the bass and chords are mapped to a knob.
It definitely does make a difference to the chords. So far, although a
few people don't like the drums, nobody's noticed anything strange
happening with the tuning. It varies between and beyond 19 and 22-ED2.

It's easy to get this working with Kyma. Robert Walker says he's
implemented something like it for meantone in FTS, I don't know the
details.

Graham