differential coherence (was: tunings website?)

hello jacques,

> From: "jacques dudon" <aeh@free.fr>
> To: <tuning@yahoogroups.com>
> Sent: Friday, June 06, 2003 5:24 AM
> Subject: Re: [tuning] Re: tunings website?
>
>
> monz in tuning list thursday 5th of june wrote :
>
> >
> > i pride myself on keeping up with tuning
> > terminology ... what am i missing out on here?

that message was meant more as a joke than
anything else. :)

but i'm glad that it prompted you to respond in
such a constructive way!

the truth is: i've been busy with my software
project and with other "real life" lately,
and haven't been following the tuning lists
in too much detail. so i missed Gene's definiton.

yes! please help me with a Dictionary entry for
"differential coherence". i'm fairly comfortable
with French, so if you write it in both French
and English i think i can put together a decent
English version. thanks!

-monz

> Hello Joe,
> I enjoy your dictionnary a lot, in fact it is quite
> complementary to my personnal approach of tuning,
> and very well done. But I noticed a few terms, or
> concepts are lacking. There is for example no entry
> on difference tones, which is the basis on my research on
> "differential coherence", the subject of an article
> I wrote in 1998, first published in french and translated
> recently in the last 1/1 journal issue. Differential
> coherence is used in my CD Lumi�res audibles (1996),
> and in many other pieces of mine and a few other
> composers ; It has been discussed briefly in the tuning
> list, where Gene proposed an improved formal definition
> of it ; it has been implemented recently by Manuel Op
> de Coul in the last version of Scala ; It is also the
> basis of another area or research of our group called
> the "fractal series", and the "fractal waveforms" where
> timber and intonation become a single thing.
>
> It is a very practical thing, whose qualities have been
> tested through many studies we did collectively here
> in the permanent psychoacoustic workshop of the AEH.
> And I can give exemples of how most traditional scales
> are strongly differentially coherent.
>
> I am nowadays completing a database of differential-coherent
> scales (I don't know if I should say "differentially coherent"
> or differential-coherent", whatever) which will be published
> in our website (in progress) as soon as I reach a significant
> number.
>
> So it should be mentionned in your dictionnary, as one
> simple and very powerful tool for sound exploration.
> It's not very complex either and I can help you to resume
> it in a few words - except that english is not my native
> language.
>
> Cheers,
> and good luck also for tonalsoft...
> ---------------------------------------------------
> Jacques Dudon - Atelier d'Exploration Harmonique
> Les Camails
> 83340 Le Thoronet - France
> tel +fax : 33 (0)494 73 87 78
> 2nd tel +messages : 33 (0)494 73 80 25
> mailto:aeh@free.fr
> http://aeh.free.fr