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   Re: An Exploration of Non-linear Dynamic Systems (NLDS) and XML

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Thanks Evan.  I wasn't aware that such a thing as a MusicML existed. 
Makes good sense, however.

I have been reading recently about "genetic algorithms".  This is where
you take two "things" and join them together (reproduce) to form a new
thing.  You do this over and over, each time the result is evaluated for
fitness.  The idea is that the best traits will survive, yielding
superior specimens.  It would be quite interesting to run a genetic
algorithm on some MusicML XML documents to see what pops out.  /Roger

evan@evanlenz.net wrote:
> Roger L. Costello wrote:
> > Len Bullard wrote:
> > > A good NLDS program does not choreograph because
> > > that makes the process a fixed form.  It orchestrates:
> > > defines roles, rules of roles, and assigns instrumentation.
> > > Then it is an intelligent performance and this can be tuned
> > > to inhibit or evoke non-linear behaviors.
> >
> > This needs to be expanded upon with some concrete examples.
> <snip/>
> > What's next?  How can you participate? I can think of
> > four things:
> >
> > 1. Can you suggest some interesting examples which would
> > require non-linearity, and would use XML?
> Maybe there's something more to the musical metaphor (orchestration,
> instrumentation, performance, tuning) than just metaphor, if you're
> looking for examples. As far as XML's role goes, we have a nice vocabulary
> for (Western) musical material already: http://www.musicxml.org/xml.html
> The mathematics are out of my league, but I do like the idea of being able
> to generate alternative "performances" of the basic stuff you would find
> in the MusicXML representation of, say, a Bach cantata, whether involving
> human interaction or not, while employing XML tools to boot.
> Sometimes I wonder whether XML and XSLT really make sense to use for some
> of my unexplored computing interests (such as "musical transformations",
> whatever that might mean). But maybe the virtue is not so much "the right
> tool for the right job" as the fact that new people are looking at known
> problems in new social and technical contexts, simply because they like to
> use the same tools. Roger's enthusiasm is emboldening on that front.
> Evan Lenz
> http://evan.pcseattle.org
> http://xmlportfolio.com


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