SymmetricalJustTunings Yahoo Group:

/SymmetricalJustTunings/

Bill Flavell

--- In tuning@y..., "bill_flavell" <bill_flavell@e...> wrote:

/tuning/topicId_36852.html#36852

>
> /SymmetricalJustTunings/
>
>
> Bill Flavell

***Hmmm. There don't seem to be any messages yet to this group.
Surely there is more to say about the subject than that...

J. Pehrson

--- In tuning@y..., "jpehrson2" <jpehrson@r...> wrote:

> ***Hmmm. There don't seem to be any messages yet to this group.
> Surely there is more to say about the subject than that...

Tons of things have already been said about it. Maybe some reposts would help.

> Subject: Re: SymmetricalJustTunings Yahoo Group:
>
> --- In tuning@y..., "jpehrson2" <jpehrson@r...> wrote:
>
> > ***Hmmm. There don't seem to be any messages yet to this group.
> > Surely there is more to say about the subject than that...
>
> Tons of things have already been said about it. Maybe some reposts would help.
>

Indeed. I can't remember anything with that particular name as a topic.
Why is it such a contentious subject that it requires its own list?

Bob "quietly playing my guitars these days" Valentine

--- In tuning@y..., Robert C Valentine <BVAL@I...> wrote:

> Indeed. I can't remember anything with that particular name as a topic.
> Why is it such a contentious subject that it requires its own list?

I would have thought someone would at least make a JI list first, but
this is freedom hall so far as list-making goes. Two contexts in which
this has come up:

(1) Periodicity blocks are a rich source of these, particularly when
there are an odd number of scale steps

(2) Scales which are symmetrical Euclidean lattices where triads are
triangles and tetrads are tetrahedrons (eg, hexanies) qualifiy. In fact,
they poessess a great deal *more* symmetry.

In-Reply-To: <20020506.232353.-1895327.6.genewardsmith@juno.com>
Gene W Smith wrote:

> I would have thought someone would at least make a JI list first, but
> this is freedom hall so far as list-making goes. Two contexts in which
> this has come up:

Bill started a JI list a while back. See

<http://groups.google.com/groups?hl=en&threadm=6kg0av%243mp%241%40as4100c.
javanet.com&rnum=13&prev=/groups%3Fq%3DBill%2BFlavell%26start%3D10%26hl%3D
en%26selm%3D6kg0av%25243mp%25241%2540as4100c.javanet.com%26rnum%3D13>

The archive's dead, so you can't see the message that caused the list to
collapse. But this one shows his general musico-philosophical outlook:

<http://groups.google.com/groups?q=g:thl2257990837d&dq=&hl=en&selm=8744566
55.98%40dejanews.com>

Oh, and there is a JI list on Yahoo, newjustintonation.

Graham

--- In tuning@y..., graham@m... wrote:

/tuning/topicId_36852.html#36860

>
> Oh, and there is a JI list on Yahoo, newjustintonation.
>
>
> Graham

***I believe that was Kraig Grady's group, and he took it down a long
time ago...

J. Pehrson

--- In tuning@y..., Gene W Smith <genewardsmith@j...> wrote:

/tuning/topicId_36852.html#36859

> --- In tuning@y..., Robert C Valentine <BVAL@I...> wrote:
>
> > Indeed. I can't remember anything with that particular name as a
topic.
> > Why is it such a contentious subject that it requires its own
list?
>
> I would have thought someone would at least make a JI list first,
but
> this is freedom hall so far as list-making goes. Two contexts in
which
> this has come up:
>
> (1) Periodicity blocks are a rich source of these, particularly when
> there are an odd number of scale steps
>
> (2) Scales which are symmetrical Euclidean lattices where triads are
> triangles and tetrads are tetrahedrons (eg, hexanies) qualifiy. In
fact,
> they poessess a great deal *more* symmetry.

***Oh... I finally think I see where this is going... So, in other
words, the Erv Wilson "combinatorial product set" tunings would fit
into this category??

Thanks!

J. Pehrson

--- In tuning@y..., "jpehrson2" <jpehrson@r...> wrote:

> ***Oh... I finally think I see where this is going... So, in other
> words, the Erv Wilson "combinatorial product set" tunings would fit
> into this category??

These are octave equivalent scales of rational numbers q such
that if q is in the scale, so is 2/q. Because of octave
equivalence, this is the same as saying if q is in the scale, so
is 1/q. It gives radial symmetry in a lattice, and is a type of
symmetry exhibited by many scales, which can have more--eg,
major/minor symmetry.

--- In tuning@y..., "genewardsmith" <genewardsmith@j...> wrote:

/tuning/topicId_36852.html#36867

> --- In tuning@y..., "jpehrson2" <jpehrson@r...> wrote:
>
> > ***Oh... I finally think I see where this is going... So, in
other
> > words, the Erv Wilson "combinatorial product set" tunings would
fit
> > into this category??
>
> These are octave equivalent scales of rational numbers q such
> that if q is in the scale, so is 2/q. Because of octave
> equivalence, this is the same as saying if q is in the scale, so
> is 1/q. It gives radial symmetry in a lattice, and is a type of
> symmetry exhibited by many scales, which can have more--eg,
> major/minor symmetry.

***Thanks, Gene!

Well, I wish I could hear some examples of these, if anybody has done
any...

J. Pehrson