previous Tuning Digest # 1592 next

edited by Joe Monzo

From the Mills College Tuning Digest


From: Tuning Digest
To: monz@juno.com
Date: Wed, 25 Nov 1998 10:57:18 -0500 (EST)
Subject: TUNING digest 1592

TUNING Digest 1592

Topics covered in this issue include:

1) Re: TUNING digest 1591
by Carl Lumma

2) Csound card
by Carl Lumma

3) answering machine
by Carl Lumma

4) RE: Erlich's Contest
by "Paul H. Erlich"

5) Cognitive limits
by Stephen Soderberg

6) reply to Lumma's reply to Grady
by "Paul H. Erlich"

7) "undertone series"
by "Paul H. Erlich"

8) Microtonal Composition Software
by Saxarba

9) Reply to Stephen Soderberg
by "Paul H. Erlich"

10) reply to Ed Foote on Mozart Tuning
by "Paul H. Erlich"

11) Carillon Tuning
by "Darren Burgess"

12) subharmonic series
by monz@juno.com

13) Re:Reply to Carl Lumma
by Kraig Grady

14) Re:DJWOLF/BABBITT
by Kraig Grady

15) Re: Reply to Paul Erlich
by Kraig Grady

16) pitch-class
by monz@juno.com

17) Re: A strange 9-limit temperament
by Dave Keenan

18) Re: reply to Paul H. Erlich to Ed Foote on Mozart Tuning
by Johnny Reinhard

19) Re: reply to Paul H. Erlich to Ed Foote on Mozart Tuning
by Manuel.Op.de.Coul@ezh.nl

20) Re: Microtonal Composition Software
by Manuel.Op.de.Coul@ezh.nl

21) Most 7-limit consonances with 12 pitches
by Paul Hahn

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Topic No. 1

Date: Tue, 24 Nov 1998 12:29:27 -0800
From: Carl Lumma
To: Tuning Forum
Subject: Re: TUNING digest 1591
Message-ID: <19981124172858593.AAA165@nietzsche>

any sensitivity to mistuning in melody (making comma adjustments) must be at least an order of magnitude rougher than the acoustic pleasure tolerance of 1-4 cents.
Carl, did you miss my post to TD 1585, on Tuesday Nov. 17th, where I

I did miss it. And I disagree with the implied results of the experiment. I experience a great deal of pleasure from purely-tuned chords, and that pleasure is absent when the chords are mistuned. In fact, mistuned chords cause me discomfort if they are sustained for any period of time.

There are plenty of experiments with results just the opposite of the one you cite, and it shouldn't be surprising since we're talking about people's subjective likes and dislikes. Also, I think "melodic mistuning" can mean a lot of things. If you listen to a capella recordings of groups like the Swingle Singers, The King's Singers, or various Barbershop groups, you will hear a type of melodic mistuning that I don't think you'll find the least bit upsetting. In fact, I wish you'd take my advice and get the following album...

Nightlife, Basin Street Blues

..it is the best single example of singing (yes, in general) I know of.

Isn't it amazing how many definitions the word "interval" has? Here, I meant a (number of scale steps, acoustic magnitude) pair. So no, the usual diatonic is not an example; the tritone is not a type of fifth in the natural minor.
What do you mean?

The fifth degree of the natural minor mode of the diatonic scale is not a tritone. If you check out the matrices I posted, I am sure you will understand my questions.

I think it's been mentioned on this list before (or was it on HPSCHD-L, where we have frequent temperament wars also?) that organs were built which were tuned in meantone well into the 19th century, particularly in England.

Reality check, folks. Organs are still being built for meantone, and the idea that there was any kind of standard in Mozart's time is absurd. Back then, instruments were tuned by ear in a hurry (because you had to tune them all the time) with little regard for anything written in a book. The answer is well temperaments, of all sorts imaginable.

Carl

------------------------------

Topic No. 2

Date: Tue, 24 Nov 1998 12:38:39 -0800
From: Carl Lumma
To: Tuning Forum
Subject: Csound card
Message-ID: <19981124173810593.AAA376@nietzsche>

Website: http://www.analog.com/support/systems/audio/csound.html [doesn't work]
It is in some sense a developer's card, but it does do what you asked, realtime synthesis on a card. I am not saying it is necessarily a solution to your needs, but it is a data point. I declare a mild interest in that I have assisted in the software for this card, and taken airfares etc from Analog Devices.

Thanks for the info. The URL is giving some sort of 404, however.

Carl

------------------------------

Topic No. 3

Date: Tue, 24 Nov 1998 12:55:11 -0800
From: Carl Lumma
To: Tuning Forum
Subject: answering machine
Message-ID: <19981124175442031.AAA186@nietzsche>

Regarding talk about melody vs. harmony, I would like to perform an experiment.

Pacific Bell has been rather tardy in deleting my voicemail account since I left California. Hopefully, they won't remedy this in the next 24 hours. Here's what I propose...

Call (510) 433-7271 and listen to my greeting, which I made on Norman Henry's 11-limit harpsichord.

It's pretty simple, but you do get a taste of a harmonic series melodic effect at the end. What do you think? How well did the 7/4 work as a leading tone?

Carl

------------------------------

Topic No. 4

Date: Tue, 24 Nov 1998 16:20:30 -0500
From: "Paul H. Erlich"
To: Tuning Forum
Subject: RE: Erlich's Contest
Message-ID: <85B74BA01678D211ACDE00805FBE3C050B6530@MARS>

While the argument for the 10-of-22 scale is thorough, well-presented, and very compelling, it remains to be proven or disproven only through a body of music, since that is what the theory is for.

I have played little tidbits of decatonic music, but since I've obtained my 22-tone instruments, I've been more drawn to 22's non-decatonic resources. The idea was a purely theoretical one, in the tradition of Yasser, Balzano, etc., but with what I feel are more valid criteria.

Unfortunately, the only reasonable instrument for decatonic music that exists at the moment is the guitar, which is simply not my can of worms...

How about a piano tuned to 12 out of 22 (put 1/22 oct. at e-f and b-c), or if you want to modulate around all 22 keys, the main keyboard mapping described in my paper?

Can't work for what? The specific set of rules you chose to generalize diatonicity? There must be other sets of rules that capture the essence of G.D. just as well:

The rules I chose capture pretty much all the important features of the diatonic and pentatonic scales, in my opinion. I have considered many of the characterizations made by other authors (MOS, propriety, unique interval vector, etc.) and come to the conclusion that these are less important.

And I don't think that we have to rotate through major and minor to achieve diatonicity. We could rotate through higher and lower identities, or all sorts of things.

I wholeheartedly agree, and would love to find some scales that do anything like that.

On the many-tones issue, I think the tetrachord structure helps to reduce the number of independent elements that need to be perceived, and compositional technique can make at least as much difference as an order of magnitude difference in the number of tones.

------------------------------

Topic No. 5

Date: Tue, 24 Nov 1998 16:31:30 -0500 (EST)
From: Stephen Soderberg
To: Tuning Forum
Subject: Cognitive limits
Message-ID:

Carl Lumma posts some interesting questions about cognitive limits. In particular, the "Miller limit" poses an interesting challenge:


> 
> tones   effect                      propriety            music
> -----------------------------------------------------------------------------
>   2-4   too easy                    little importance    chant
>         less interesting                                 ritual song
>         more "join in" potential
> 
>  5-12   tracking starts to slip     most important       polyphony
>         mind has fun trying to                           parallel harmony
>         keep its place                                   melody over chords
> 
> 11-22   tracking the entire scale   some importance      parallel harmony
>         impossible: mind "chunks"                        melody over chords
>         scale into proper subsets                        melody over drone
>         and tracks within/between
>         those
> 
> 23-34   inability to focus or       no importance        conceptualism     
> and up  mind begins to fuse 
>         individual simuli and
>         re-interprets as if
>         hearing 5-9 tone scale

and ...

(a) It's been shown that average dudes from all over can count how many stones you toss on the ground almost instantly- so long as you don't toss more than six stones at a time. Since a good deal of the interest of G.D. scales comes from the interaction between parts in polyphonic composition, it seems that we'll lose something if we go above the 11-limit.

This doesn't take into account (unless I'm missing something -- a distinct possibility) the mind's characteristic ability to recognize (and organize into) patterns. It may not be as "instantaneous" as Miller's tests suggest (and I admit I don't know the study -- I'm going on the present description and similar ones I've heard), but seven stones are nearly immediately organized into four-plus-three and so on. Second, a strictly "melodic" test doesn't take into account the full power of many musics to organize material into recognizable, memorable chunks.

The most pertinent example is good old 7-space ME imbedded in 12-space -- the "usual diatonic." It's not exactly a secret that this presents a "bi-modal" system with three major and three minor triads. Further, the two modes mirror one another, each containing what we traditionally have called a "tonic," "dominant," and "subdominant" triad, linked like this (using pitch-class notation, e.g., 0=C, 1=C#, etc.):


(SD)    5  9  0                    2  5  9
(T)           0  4  7                    9  0  4
(D)                 7  11 2                    4  7  11

And each triple "covers" the scale.
[example by Monzo]

From Introductory Diatony 101 let's now return to the Erlich string (22@41) discussed in earlier posts, since, as a 22-note scale, it's right at the outer "focus" limit in Carl Lumma's chart. Let's first list this scale in its pitch-class version to see just how absurd it would be to think of an audience (or even an individual) with good enough pitch retention to make sense out of a context-less melody using this scale...

{0,2,4,6,8,10,12,13,15,17,19,21,23,25,26,28,30,32,34,36,38,40}.

Now, it just so happens that, buried in these 22 notes, are some interesting ORDERING properties which can be used (compositionally) to build some (contextual) structures that shouldn't be difficult to remember and relate to one another, melodically or otherwise.

I noted before that, with a simple trick (a WARP transformation as used in simple diatonic structures) we can organize this material into a "quadrimodal" system -- two pairs of inversionally related pentachords. I also suggested plotting these onto a circle to see their peculiar and unique arrangement. Those of you who did this can now guess where I'm going. Taking only one of these chord types -- the one built on the interval string <87t79>, we find one pentachord that acts like a "tonic" (on 0), two that act like "dominants" (on 26 and 28) and two that act like "subdominants" (on 13 and 15). These are listed below. The only chord in "prime" position is the "tonic" in the middle; the rest are rotated to demonstrate the smooth (hyper)diatonic voice-leading and common tones:


    /  38  4  13  21 <28
"SD"
    \  40  6  15  23  30

 "T"=   0  8  15  25  32

    /   0 10  17  26  34
 "D"
    \   2 12  19  28> 36

Note that these five chords (like the three in the usual diatonic) cover the scale. Each of the other three "mode groups" works the same way, complete with the double-dominant relations, voice-leading and covering properties. Furthermore, you can easily slip from one mode to another by maximal common-tone relationships which appear as common-triads. E.g., in a different mode, the scale gives us the pentachord {8,15,23,32,40} which can move easily to {0,8,15,25,32} by holding the common-triad {8,15,32} and moving the other two voices by (hyper)diatonic step.

My point (beyond maybe tempting someone out there to use this system to compose) is this: the internal musico-mathematical characteristics (organizational capabilities) of a given scale might tend to ameliorate what might otherwise be an insurmountable complexity. In the Erlich string, I don't see a 22-note scale -- I see a 4-mode division of pentachord types (and a couple of interesting looking "diminished" pentachords) each of which forms a very peculiar T-D-SD triangle (and NB: there are other ways to organize an Erlich string). My mind can't grasp 22 objects until they're built into a cohesive structure, however strange it might appear at first. Put another way: I can't "grasp" 10,000 bricks, but I can easily "grasp" a brick house.

Steve Soderberg

------------------------------

Topic No. 6

Date: Tue, 24 Nov 1998 17:10:02 -0500
From: "Paul H. Erlich"
To: Tuning Forum
Subject: reply to Lumma's reply to Grady
Message-ID: <85B74BA01678D211ACDE00805FBE3C050B6531@MARS>

said you didn't. I did say that the 12-out-of Stellated Hexany tuning has the greatest number of consonant intervals of any possible 12-tone subset of the 7-limit. Did you know this? Or is it incorrect? I have no proof...

What's the largest mistuning you'll allow? Did you catch my repost of my post from Nov. 17th on meantone vs. just (that is, harmonic mistuning vs. melodic mistuning)?

------------------------------

Topic No. 7

Date: Tue, 24 Nov 1998 17:18:19 -0500
From: "Paul H. Erlich"
To: Tuning Forum
Subject: "undertone series"
Message-ID: <85B74BA01678D211ACDE00805FBE3C050B6532@MARS>

Partch credits Riemann and many others in preceding his "utonality" concept. The concept has an intersting status around here, with a few giving it little to no importance (e.g., Heinz Bohlen), a few giving it near-equal status with the otonal or "overtone series" concept, such as Daniel Wolf and (implicitly) Bill Sethares, and most of us falling somewhere in between. Interval-wise, utonalities and otonalities are equivalent, but there are important harmonic effects due to combinations of three of more tones that render otonal chords more "tonal".

------------------------------

Topic No. 8

Date: Tue, 24 Nov 1998 23:16:06 +0100
From: Saxarba
To: Tuning Forum
Subject: Microtonal Composition Software
Message-ID: <365B3026.68A5EA69@gmx.net>

We are one composer and one programmer from Europe (Lithuania, Germany) who are working on a software for composing and producing electronical microtonal music.

This software product (for windows platform) being developped by us combines two different fields: - provision of the scales of microintervals down to 1/64 semitone - production of tonal structures by help of mathematic musical functions

The procedure developped by us could lead to the synthesis of the traditional techniques of composition and use of mathematical functions.

We just want to ask you if anybody of you is interested in our project in any way or knows about some similar software product or is dealing with microtonal electronic composition. We would be glad to receive an answer from you.

Yours
Dr. Kabelis
A. Hemprich

------------------------------

Topic No. 9

Date: Tue, 24 Nov 1998 17:27:37 -0500
From: "Paul H. Erlich"
To: Tuning Forum
Subject: Reply to Stephen Soderberg
Message-ID: <85B74BA01678D211ACDE00805FBE3C050B6533@MARS>

So to malign 12tET (so I assume) is to malign its effects on the ear, not its 12-space compositional-theoretic properties, which are quite potent regardless of how you tune it. Likewise, arguments about how the diatonic scale should *really* be tuned (for psycho-acoustic or historical or any other reason) are mostly irrelevant to its basic 7-space (compositional-theoretic) properties which carry over to any tuning that closes (or pretends to close) at the octave. In the end, things like n-tone theory or ME theory or hyperdiatonic theory are abstract and have nothing to do with tuning.

And almost nothing to do with music. Stephen, I couldn't disagree with this position more, but I have only the highest respect for your intellectual rigor, and I appreciate the respect you've shown to mine. As a starting point for some discussion, perhaps you could tell us how far you'd go in defending the phrase "regardless of how you tune it" in the first sentence above. I infer that some would require a Rothenberg proper 12-tone scale; how about you, Stephen?

------------------------------

Topic No. 10

Date: Tue, 24 Nov 1998 18:09:45 -0500
From: "Paul H. Erlich"
To: Tuning Forum
Subject: reply to Ed Foote on Mozart Tuning
Message-ID: <85B74BA01678D211ACDE00805FBE3C050B6539@MARS>

Why would you want a well-temperament if the music avoids the keyboard wolf? There are many more ways to achieve variegation of key color when one allows the wolf to be present than when one insists on its disappearance. The "realm of historical possibilities" is perhaps 10% documented in the literature and if one is making judgments with modern ears it is foolish to restrict oneself to documented possibilities of another era.

Last time we had this discussion, weren't there a few people who had various pieces of evidence for Mozart favoring meantone? Like his teaching of two semitone sizes, diatonic and chromatic? And his reaction to a 31-tone (obviously, meantone) instrument he played on?

------------------------------

Topic No. 11

Date: Tue, 24 Nov 1998 19:04:24 -0500
From: "Darren Burgess"
To: Tuning Forum
Subject: Carillon Tuning
Message-ID: <0551a14220019b8KHAFRE@acceleration.net>

Darren Burgess from Gainesville FL here. I have posted a proposed tuning for the Schulmerich JI carillon at http://www.interbeing.com/carillon/tuning.htm. If you take a look, you will note that two pitches are assigned to each bar. Each bar has two solenoids, one that emphasizes the first harmonic (harp), and one the second (celeste). This allows for having more than 12 tones per octave (up to 24). I will provide more information for those who are interested.

Please, any feedback would be greatly appreciated.

Darren

------------------------------

Topic No. 12

Date: Tue, 24 Nov 1998 19:21:13 -0800
From: monz@juno.com
To: Tuning Forum
Subject: subharmonic series
Message-ID: <19981124.192115.-148507.0.monz@juno.com>

from Steve Soderberg:

Joe Monzo:
The "subharmonic scale" can be characterized as a utonal progression, in Partch's terms. It is the exact inverse of the "harmonic series" of overtones above a fundamental. In the case of subharmonics, the "fundamental" is the highest note in the series, with the subharmonics in reciprocal integer ratios below it.
I keep forgetting to bring this up to see if any of you can shed some light, so now is as good a time as any... It's my understanding that in the 19th century Riemann, partly as an effort to acoustically justify the minor triad, postulated the "undertone series" which, of course, was attacked as being a strictly theoretical (non-acoustic) construct. I haven't got a copy of Partch handy, but does he credit Riemann at any point, or is Partch's version a "rediscovery"? Or am I missing a significant distinction?

This was discussed over the course of a few days back around TD 1350 or so. Partch [Genesis, p 390] notes that Riemann accepted the concept of an "undertone" series, but derides Riemann's convoluted explanation of the "minor" triad.

Dualism and Functionalism were the fundamental concepts in Riemann's original conception of harmonic practice. However, he himself eventually came to discredit the belief in an "undertone" series. (sure do wish I had my books with me, so I could give the citations)

Partch clearly based his entire theory upon dualism [Genesis, p 88-90, Monophonic Concepts # 2 and 3], but gives Riemann no further credit than that stated above.

------------------------------

Topic No. 13

Date: Tue, 24 Nov 1998 20:10:55 -0800
From: Kraig Grady
To: Tuning Forum
Subject: Re:Reply to Carl Lumma
Message-ID: <365B8330.736208D2@anaphoria.com>

The construction of Centaur (1977) fulfills the property that each interval that occurs is subtended by the same number of steps. This preserves and allows the possibility of recognizable melodic transpositions.
Could you explain more? You have got my interst up.--

It means that whenever we have a 3/2 it is seperated by 7 steps of a 8/7 by two steps. Also it one of its subsets, the major scale you have fifths occuring every 5 steps, the thirds 3. There is the disjunction of the tritone if we if we see this scale projected as fifths. For the most part this closing interval will be unique but will be larger than the intervals associated with the steps below it (in this case thirds) and smaller than those intervals of larger etc.

Look at the 1-3-5-7-9 double dexany and you will see a 14 tone scale that is truly a scale.

I'm not familiar with the double dekany. I am familiar with dekany and pentadekany. Perhaps you could be more specific?

it is the 2 out of 5 and 3 out of 5 combined!

I did say that the 12-out-of Stellated Hexany tuning has the greatest number of consonant intervals of any possible 12-tone subset of the 7-limit. Did you know this? Or is it incorrect? I have no proof..

the hexany is always the first structure I rush for when looking for the most for the least! From there I do my damnest to use as few notes as possible to make a scale under the guidlines above as implied in Erv MOS. There is the tanabe cycle which illustrates the pentatonics found in the diatonic. Erv refers to them as second order MOS and this is where all the following theorists are silent! I for now interpet these as working as scales because the "generator" ( the building block of the scale ) remains consistant in its steps. With the scale F A B C E we find the disjuction A -C being the atypical 4th.

Fr

Kraig Grady
North American Embassy of Anaphoria Island http://www.anaphoria.com --------------0F1A443F1436DD5251B172E1 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit >The construction of Centaur (1977) fulfills the property that each
interval >that occurs is subtended by the same number of steps. This
preserves and >allows the possibility of recognizable melodic transpositions.

Could you explain more?  You have got my interst up.--

It means that whenever we have a 3/2 it is seperated by 7 steps of a 8/7 by two steps. Also it one of its subsets, the major scale you have fifths occuring every 5 steps, the thirds 3. There is the disjunctionof the tritone if we  if we see this scale projected as fifths. For the most part this closing interval will be unique but will be larger than the intervals associated with the steps below it (in this case thirds) and smaller than those intervals of larger etc.

Look at the 1-3-5-7-9 double dexany and you will see a 14 tone scale that
is >truly a scale.

I'm not familiar with the double dekany.  I am familiar with dekany and
pentadekany.  Perhaps you could be more specific?

it  is the 2 out of 5 and 3 out of 5 combined!

 I did say that the 12-out-of Stellated Hexany
tuning has the greatest number of consonant intervals of any possible
12-tone subset of the 7-limit.  Did you know this?  Or is it incorrect?  I
have no proof..
.
the hexany is always the first structure I rush for when looking for the most for the least! From there I do my damnest to use as few notes as possible to make a scale under the guidlines above as implied in Erv MOS. There is the tanabe cycle which illustrates the pentatonics found in the diatonic. Erv refers to them as second order MOS and this is where all the following theorist are silent! I for now interpet these as workings as scales because the "generator" ( the building block of the scale ) remains consistant in it steps. With the scale F A B C E we find the disjuction A -C being the atypical 4th.

Fr

Kraig Grady
North American Embassy of Anaphoria Island
http://www.anaphoria.com
  --------------0F1A443F1436DD5251B172E1--

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Topic No. 14

Date: Tue, 24 Nov 1998 21:40:43 -0800
From: Kraig Grady
To: Tuning Forum
Subject: Re:DJWOLF/BABBITT
Message-ID: <365B982F.5EAA873A@anaphoria.com>

Pardon the misunderstanding I to find many ideas of these individuals worthy of note. I just chringe though with some of them assumptions that music is nothing more than the interaction of formal relationships. But true if you were so inclined the CPS are the way to go! --

Kraig Grady
North American Embassy of Anaphoria Island http://www.anaphoria.com

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Topic No. 15

Date: Tue, 24 Nov 1998 22:02:45 -0800
From: Kraig Grady
To: Tuning Forum
Subject: Re: Reply to Paul Erlich
Message-ID: <365B9D55.3681FC5D@anaphoria.com> --------------DCD5F42D0D93E36AC58701E1 Content-Type: text/plain; charset=us-ascii; x-mac-type="54455854"; x-mac-creator="4D4F5353" Content-Transfer-Encoding: 7bit

The notion of accepting intervals because they are not any worst than the triad in 12 et is absurd. why not stay with 12 then!

Because I wanted consonant tetrads, not just triads. The 7-limit seems to be the way to go, and 12-tET has poor 7-limit tetrads. In fact, were it not for this "absurd" desire, I would probably not have developed an interest in alternate tunings at all!

I applaud and respect your desire! that 's not Absurd! If this tetrad is good for your uses go ahead. It just I would hope one would say the sound was right or worked and not put in just mathematical Justification. The first tuning I worked with was 31 which supplied me with a good 7 and 11/9 but after a few years of working with it it was the 9/8 that made it unbearable. It lacks all "asertiveness" this interval gives us. On the other hand 19 which I have never liked, I found liking in the hands of Neil Haverstrick (His most recent CD which surpasses his first) and his live performance of at the micro fest two years back on a 34 ( Hansons' Baby) sounded better than the math says it should ( I understand why), Lucys Tuning also sounds better than one might expect! The desire for consonant tetrads reflects my own desire for not so much wanting new sounds or chords but new consonances. After having, these I realized that new structural possibilities that are nonsense in 12 where possible. But even with your 22 the relationship of 7 are not confused with 9 like they are in 12. I am sure you enjoy these also!

Kraig Grady
North American Embassy of Anaphoria Island http://www.anaphoria.com The notion of accepting
>intervals because they are not any worst than the triad in 12 et is
>absurd. why not stay with 12 then!

Because I wanted consonant tetrads, not just triads. The 7-limit seems
to be the way to go, and 12-tET has poor 7-limit tetrads. In fact, were
it not for this "absurd" desire, I would probably not have developed an
interest in alternate tunings at all!

I applaud and respect your desire! that 's not Absurd! If this tetrad is good for your uses go ahead. It just I would hope one would say the sound was right or worked and not put in just mathematical Justification. The first tuning I worked with was 31 which supplied me with a good 7 and 11/9 but after a few years of working with it  it was the 9/8 that made it unbearable. It lacks all "asertiveness" this interval gives us. On the other hand 19 which I have never liked, I found liking in the hands of Neil Haverstrick (His most recent CD which surpasses his first) and his live performance of at the micro fest two years back on a 34 ( Hansons' Baby) sounded better than the math says it should ( I understand why), Lucys  Tuning also sounds better than one might expect! The desire for consonant tetrads reflects my own desire for not so much wanting new sounds or chords but new consonances. After having, these I realized that new structural possibilities that are nonsense in 12 where possible. But even with your 22 the relationship of 7 are not confused with 9 like they are in 12. I am sure you enjoy these also!
Kraig Grady
North American Embassy of Anaphoria Island
http://www.anaphoria.com
 

------------------------------

Topic No. 16

Date: Wed, 25 Nov 1998 01:14:06 -0800
From: monz@juno.com
To: Tuning Forum
Subject: pitch-class
Message-ID: <19981125.011408.-137027.0.monz@juno.com>

Dan Wolf wrote:

I mean, where would we be if Babbitt hadn't invented the term pitch class?

Perhaps eternally lost in a non-octave-scale harmonic world?

My initial intention in saying that was to be flippant, but there is a serious truth embedded in this:

Pitch-class is admittedly an important term, useful in discussing theoretical points. But accepting the idea that pitches roughly an "octave" apart have the same aesthetic effect/affect leads by extrapolation to the acceptance of the other prime (or odd) affects.

This feeling of similarity is precisely the musical affect associated with 2, the first prime number, and is what led the ancient Greeks to divide numbers between odd and even [see "odd" in my dictionary: http://www.ixpres.com/interval/monzo/define.htm#odd].

Even if the interval most often perceived as a consonant "octave" is _not_ precisely a 2:1, I would argue that 2:1 is the _categorically-perceived_ "octave" interval.

Perhaps concepts similar to "pitch-class" could be formulated for the affects perceived in other-prime (or other-odd) relationships.

Perhaps affect is a phenomenon associated only with primes and not with odd-numbers per se, since 2 is the only even prime.

Perhaps the unusual affect of _similarity_ in the "octave" occurs only _because_ 2 is the only even prime.

---------

BTW, I actually _like_ some of Babbitt's music, although I've long since lost patience with his overly convoluted prose style.

- Joe Monzo
monz@juno.com http://www.ixpres.com/interval/monzo/homepage.html

------------------------------

Topic No. 17

Date: Thu, 26 Nov 1998 00:09:05 +1000
From: Dave Keenan
To: Tuning Forum
Cc: gbreed@cix.compulink.co.uk
Subject: Re: A strange 9-limit temperament
Message-ID: <3.0.2.32.19981126000905.00968d70@uq.net.au>

Many thanks to Graham Breed, who finally got me to see this tuning as a "detempered" 12 of 22-tET. That is, taking 12 of 22-tET part of the way back towards Just. Not that it was in any way obvious how to do this profitably.

This would normally mean increasing the accuracy of intervals (ratios) at the expense of a reduction in the number of sufficiently accurate intervals. But in this case, while we do lose four 7-limit intervals, we might be considered to make up for it by gaining some 9-limit ones.

For those who haven't seen it before, and as a new slant for those who have, it looks like two chains of fifths a half-octave apart, where the middle fifth of each chain is slightly wider than a 22-tET fifth and the others are slightly narrower.



 Eb -706- Bb -706- F  -712- C  -706- G  -706- D
 |
600
 |
 A  -706- E  -706- B  -712- F# -706- C# -706- G#

As offsets from 12-tET it is



 C   C#   D    Eb   E    F    F#   G    G#   A    Bb   B
+6  +12  +18  -18  -12  -6   +6   +12  +18  -18  -12  -6

Consider the harmonic resources in each case.

12 of 22-tET has 12 complete 7-limit tetrads.

In 12-tone 7-limit JI, the most we can get appears to be 6 complete tetrads plus 2 triads (but with no pretense of being a melodic construct). Thanks for that, Carl Lumma.

In the 7-limit, my temperament is intermediate, with 8 complete 7-limit tetrads and 4 others that have a broken 7:4 (and so become 8 triads). However these bad 7:4's are actually good 16:9's which occur as 9:4's in extending other tetrads to 9-limit pentads. So nothing is wasted relative to 12 of 22-tET. In fact when 9-limit is considered, my temperament has *more* usable intervals than 12 of 22-tET. Notably, 9:5's essentially do not exist in 22-tET.

Here's a comparison of the errors:



Intvl	3:2	5:4	6:5	7:4	7:5	7:6	9:4	9:5	9:6	9:7
-------------------------------------------------------------------------
22-tET	7.1	-4.5	11.6	13.0	17.5	5.9	14.3	18.8	7.1	1.3
Keenan	4.0	-4.3	8.4	13.2	17.5	9.1	8.1	12.4	4.0	-5.1
	10.0	1.7	8.4

This is the version with 706 and 712 cent fifths. Whether you use maximum error or RMS there is a minimum in the vicinity of this pair of fifth sizes.

Note that only in the 7:6's, and in 2 of the 10 fifths, is there a significant increase in error. The minor thirds, the other 8 fifths, and the 9-limit intervals except the 9:7, are significantly improved.

So we've gained some accuracy with little loss of 7-limit harmonic resources (no loss at 9-limit).

This temperament can be seen as simultaneously approximating the following Just tunings.



1   15/14  9/8   7/6   5/4  21/16 10/7   3/2  45/28  5/3   7/4  15/8
1   21/20  9/8   7/6  49/40 21/16  7/5   3/2  63/40 49/30  7/4 147/80
1   21/20 28/25  7/6   5/4   4/3   7/5   3/2   8/5   5/3   7/4  28/15

Then there's the question of modulation. Paul Erlich's decatonic scales would presumably occur in only one or two positions in a suitable 7-limit 12-tone JI. They occur in 4 positions in 12 of 22-tET. They also occur in 4 positions in my temperament, however two of these have the transmuted 7:4's in the otonalities while the other two have them in the utonalities.

Regards,
-- Dave Keenan
http://uq.net.au/~zzdkeena

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Topic No. 18

Date: Wed, 25 Nov 1998 09:15:17 -0500 (EST)
From: Johnny Reinhard
To: Tuning Forum
Subject: Re: reply to Paul H. Erlich to Ed Foote on Mozart Tuning
Message-ID:

On Tue, 24 Nov 1998, Paul H. Erlich wrote:

Why would you want a well-temperament if the music avoids the keyboard wolf? There are many more ways to achieve variegation of key color when one allows the wolf to be present than when one insists on its disappearance. The "realm of historical possibilities" is perhaps 10% documented in the literature and if one is making judgments with modern ears it is foolish to restrict oneself to documented possibilities of another era. Last time we had this discussion, weren't there a few people who had various pieces of evidence for Mozart favoring meantone? Like his teaching of two semitone sizes, diatonic and chromatic? And his reaction to a 31-tone (obviously, meantone) instrument he played on?

I suspect the historic literature provides more than 50% of what happened in particular composer's tunings. There is much information, after all. It may not be "foolish" to focus there when trying to perform the music as the composer would have desired. I see little evidence of meantone in Mozart, if any. His father mentions Werckmeister foremost in his Violin treatise (no someone endorsing meantone). For Mozart to distinguish between 2 sizes of semitones is simply a variant of Werckmeister I tuning (or just intonation as it is derived precisely from the overtone series).

And could someone run by again with his supposed reaction to a hypothetical 31 -tone instrument?

Johnny Reinhard
AFMM

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Topic No. 19

Date: Wed, 25 Nov 1998 16:19:23 +0100
From: Manuel.Op.de.Coul@ezh.nl
To: Tuning Forum
Subject: Re: reply to Paul H. Erlich to Ed Foote on Mozart Tuning
Message-ID:

And could someone run by again with his supposed reaction to a hypothetical 31-tone instrument?

I posted this 13-aug-1994 and again 9-jul-1996. I think Kelletat makes a rather big leap with his conclusion there.

-------------------------

On my holiday this summer I was in Vienna and paid a visit to the collection of musical instruments of the museum of art history. There was a beautiful 31-tone Harmoniehammerfluegel built by Johann Jakob K"onnicke in Vienna and finished in July 1796. It has 6 rows of 37 white keys and a range of F1-g'''. The keys of the C columns have a large dot on it and the keys of the F and G columns three small dots. The layout of the five upper rows is as follows:


   Fx   Gx   Ax   Bx   Cx   Dx   Ex   Fx   Gx   Ax  ...
   F#   G#   A#   B#   C#   D#   E#   F#   G#   A#  ...
   F    G    A    B    C    D    E    F    G    A   ...
   Fb   Gb   Ab   Bb   Cb   Db   Eb   Fb   Gb   Ab  ...
   Fbb  Gbb  Abb  Bbb  Cbb  Dbb  Ebb  Fbb  Gbb  Abb ...

The keys of the bottom row are coupled to other keys. This layout enables an easy shift by a chromatic semitone of 77.4 cents by changing a row.

Beethoven and Haydn have played on this piano, which was tuned in 31 tET. K"onnicke built it with instructions of the Domkapellmeister of Linz, Johann Georg Roser who had ordered a similar instrument in Brussels ten years earlier for Mozart. Roser had several meetings in Linz with Mozart, who allegedly composed two little pieces for the instrument (according to the manuscript of Roser's biography), and which were regrettably lost.

This Harmoniehammerfluegel shows the importance meantone temperament still had at the end of the 18th century in Vienna. According to Herbert Kelletat had Mozart meantone temperament in consideration when he chose the keys for his keyboard compositions. Kelletat analysed 230 compositions with employment of a keyboard instrument or organ and found that more than 80% is in C, G, D, F, A and B flat major, exactly the same keys that have pure thirds in meantone temperament. E flat and E major are exceptions and B major is absent. Moreover in 45 symphonies Mozart used only 8 different main keys among which only a few minor.

The museum also has a 12-tone harmonium with a von Jank'o keyboard from around 1900, built in Vienna. It has 3 rows of 25 and 3 rows of 24 keys. When you press one key, two more go down, so there are only two independent rows. The purpose is easy fingering, although I imagine that it would take time to get used to.

The rest of the museum makes a visit very worthwhile too. You are allowed to play on modern copies of a spinettino and a clavichord. They also hand out wireless headphones to hear musical examples depending on where you stand in the room.

Reference: Herbert Kelletat: Zur musikalischen Temperatur, Teil II, "Wiener Klassik". Berlin: Merseburger Verlag, 1982, pp. 22-32.

Manuel Op de Coul coul@ezh.nl

------------------------------

Topic No. 20

Date: Wed, 25 Nov 1998 16:32:56 +0100
From: Manuel.Op.de.Coul@ezh.nl
To: Tuning Forum
Subject: Re: Microtonal Composition Software
Message-ID:

This software product (for windows platform) being developped by us combines two different fields: - provision of the scales of microintervals down to 1/64 semitone - production of tonal structures by help of mathematic musical functions

It looks like we are doing similar work, so I'll make a plug for my software: http://www.tiac.net/users/xen/scala/ Please tell us more about your project and perhaps we can share ideas or code.

Manuel Op de Coul coul@ezh.nl

------------------------------

Topic No. 21

Date: Wed, 25 Nov 1998 09:49:45 -0600 (CST)
From: Paul Hahn
To: Tuning Forum
Subject: Most 7-limit consonances with 12 pitches
Message-ID:

On Tue, 24 Nov 1998, Paul H. Erlich wrote:

[Carl Lumma wrote:]
[T]he 12-out-of Stellated Hexany tuning has the greatest number of consonant intervals of any possible 12-tone subset of the 7-limit. Did you know this? Or is it incorrect? I have no proof...
What's the largest mistuning you'll allow?

I think Carl's talking about JI, i.e. no mistuning at all. But Carl, I hate to break it to you, but I think you're wrong. The scale you describe has 30 7-limit consonances, but consider this 3^2 * 5 * 7 genus:

	           35:24-------35:16------105:64
	         .-'/ \'-.   .-'/ \'-.   .-'/
	      5:3--/---\--5:4--/---\-15:8  /
	      /|\ /     \ /|\ /     \ /|  /
	     / | /       \ | /       \ | /
	    /  |/ \     / \|/ \     / \|/
	   /  7:6---------7:4--------21:16
	  /.-'   '-.\ /.-'   '-.\ /.-'
	4:3---------1:1---------3:2

By my count this has 31 7-limit consonances.

--pH  http://library.wustl.edu/~manynote
    O
   /\        "'Jever take'n try to give an ironclad leave to
  -\-\-- o    yourself from a three-rail billiard shot?"

             NOTE: dehyphenate node to remove spamblock.          <*>

------------------------------

End of TUNING Digest 1592
*************************


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