The Eat at Joe's Kawai K5000 Message Board Digest
Stretch Tuning (or the Lack Therof)
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KS Pitch and "stretch" tuning
Friday, 30-Jan-98 14:48:54
130.67.0.151 writes:
First of all, does anyone know what is the pivot note for normal Key Scale? Is it
C4 (middle C, one-line C)? I cannot find this documented in the manual.
Then, under DCO, page 30, it says that KS Pitch can be used to play in quarter-
tones, or to add "stretch" to the tuning. Quarter-tones work fine, but I cannot
see that "stretch" is possible. Is this a bug in the opsys or a bug in the manual?
Or am I missing something?
Tore
tl001@online.no
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Re: KS Pitch and "stretch" tuning
Friday, 30-Jan-98 15:55:07
192.28.2.19 writes:
It's not in front of me, but I know there's a setting for how much the pitch
increases as you move up the keyboard. Usually it's set 1:1, but for a constant pitch
it would be 1:0 and for quartertones it would be 1:2. Stretch tuning would be
something like 1:1.01; I don't know exactly.
leiter@skypoint.com
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Re: Re: KS Pitch and "stretch" tuning
Monday, 02-Feb-98 12:48:29
130.67.64.84 writes:
Well, I cannot find the setting that leiter is talking about, so I want to stress
that this question is unanswered.
Tore
tl001@online.no
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Re: KS Pitch and "stretch" tuning
Tuesday, 03-Feb-98 04:17:09
208.254.230.81 writes:
Playing around with it, the only alternate interval between notes I can get out of
the K5000 is in the range of 0 - 50 cents, which is really much less useful than
it should be. I'll make sure to adding stretch tuning to the wishlist when I get
around to creating it.
Also, a quick check for the "pivot note", if I understand you correctly, gives
me (oddly enough) the "E3" note.
That means, if I put the K5000 in fixed note mode and set it to E3, I can change
the "KS Pitch" parameter and the pitch doesn't change (which doesn't
happen with any other key).
-Kenji
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Re: Re: KS Pitch and "stretch" tuning
Tuesday, 03-Feb-98 17:14:52
130.67.65.228 writes:
About "stretch" tuning on the wishlist - this item should really be on the bug
list. Because, unless I have overlooked something there is a clear discrepancy
between the manual and the K5000 here.
Tore
tl001@online.no
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Re: KS Pitch and "stretch" tuning
Tuesday, 03-Feb-98 17:51:24
192.28.2.19 writes:
Once again, I don't have it in front of me, but I looked at the Sound Diver screen
the other night and it looked like you could set both the pivot note and the
interval. The controls are the two boxes on the Sound Diver screen that are above
the boxes that have the pitch envelope values. This would let you fix a
constant note (a drone) on any note.
leiter@skypoint.com
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Re: Re: KS Pitch and "stretch" tuning
Tuesday, 03-Feb-98 23:39:15
153.37.9.251 writes:
I just checked it to make sure, but the Sound Diver settings do exactly the same
thing as the settings in the K5000. The constant note can be changed, but the
key on the keyboard which the key scaling diverges from is the E3 key (E3 is the
key which will actually play the constant note and from which the note values
of other keys can be calculated). Also, the key scaling still only goes up to a
maximum of 50 cents - a quartertone. It looks like the K5000 can't do stretch at
all!
-Kenji
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Stretch Tuning Again
Tuesday, 05-May-98 17:26:57
192.28.2.16 writes:
I was just looking thru the archive and saw the thread on stretch tuning. I
think the answer is, stretch tuning is unnecessary and wouldn't work on the K5k.
From what I've read recently, the upper harmonics of a plucked or struck
string go increasingly sharp of the ideal harmonic series the farther up the
series you go. This is the reason for stretch tuning, so that the upper harmonics
of low strings are in tune with the upper strings. The K5k makes a perfect
harmonic series (as far as I know) and so stretch tuning is unnecessary. In
fact, it would create the problem that stretch tuning is supposed to solve.
leiter
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Re: Stretch Tuning Again
Thursday, 14-May-98 13:07:21
130.67.8.185 writes:
The reason I made a fuss about stretch tuning was that my ears perceive
synthesizer tones several octaves apart to be mutually out of tunes at times.
This is, I believe, due to some nonlinearity of our hearing that varies between
individuals and age groups - in fact, I even think there are different types
of nonlinearity at work here. In my case, this sensation of flatness is highly
dependent on the timbre.
In other words, I don't think stretch tuning was introduced solely in order to
offset the effect of physical inharmonicity.
Tore
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