Piano World Home Page Forums Our Most Popular Forums Piano Tuner-Technicians Forum Stoppers temperament

Mr. Deutschle,

With nonlinearity i mean that the partials are not harmonic.

Regards,

Bernhard Stopper

Mr. Stopper:

Thanks again!

Does your software use the same nonlinearity regardless of the piano being tuned?

No, nonlinearity is different at every note and on every instrument (even with the same manufacturer/model) and as i already mentioned, the software takes consideration of nonlinearity of every note of the instrument that is actually to be tuned.

Regards,

Bernhard Stopper

Mr. Stopper:

I appreciate your time and patience very much.

I think I may now understand. Is this correct?: Your software determines the nonlinearity of the note that is being tuned, calculates the correct pitch, and gives indication to tune the note being played to this calculated pitch, regardless of the nonlinearity of any other notes on the piano.

Mr. Deutschle,
I appreciate your acceptance that i provide a limited amount of details.

Regards,
Bernhard Stopper

I think the software must establish an initial equal partition based on a P12 fundamental frequency scale: (3 x fundamental of lower note) = (fundamental of higher note). The software cannot, in principle, calculate: (third partial of lower note) = (fundamental of higher note). Then, for each note, it must calculate an offset which depends only on the inharmonicity (what Mr. Stopper calls non linearity) of the individual note (and maybe on other spectrum characteristics but for that single note) .

Regards,

This always implies an order in the tuning

Mr. Stopper:

I respect your prerogative to disclose only what you wish, and am thankful for your willingness to disclose what you have.

Rather than ask another question, permit me to add a thought. Ron Koval was glad to hear that this tuning could be reproduced with an ETD “…..you use the software to get the same results - that it just wasn't an aural speciality of yours - glad to hear that.” Hopefully the reverse is also true, that the ETD tuning can be reproduced aurally. Wish I knew how.

I want to revive this thread out of dormant curiosity.

Does anyone have the material passed out - or detailed notes - from Mr. Stopper's lectures in Kansas City this past year?

It seems there was a lot of speculation around what he was doing, but no academic paper published.

Thank you!

Tunewerk:

I have followed Mr. Stoppers posts on this and on the PTG list dating back many years. One reason it is difficult to understand just what he is doing is his desire for credit and for establishing precedent. (Heck, there are worst things to desire. I desire scrapple!)

Page 4 of this Topic is an example: http://www.pianoworld.com/forum/ubbthreads.php/topics/1722977/Beatrate_jumps_across_a_break.html

Right, I understand what you mean. But doesn't presenting the material ensure all the more, rights to the intellectual property? I'm genuinely interested in what seems like a contribution to the tuning community.

Dr. Sanderson presented much of his research findings to the Journal, much of which was the basis for developing his tuning machines.

Was there any material passed out in Kansas City? Surely someone has specifics.

I understand that material was handed out at KC. And I understand that Mr. Stopper has provided additional copies on a case by case basis. It would probably be best to contact him directly. It might also be best if you didn't mention that I sent you...

I'm a pianist, and I live in the Maryland suburbs of Washington, DC. I watched the video of Grigory Sokolov playing a (Hamburg?) D tuned by Herr Stopper, and found the sound very beautiful.

I usually tune my own piano, am interested in the OnlyPure software, but before I buy it, I'd like to hear what my piano would sound like tuned that way.

If you are, or know a tech, in my area who has and uses the OnlyPure system and would be interested in a tuning job, please send me a private message here on Piano World.

If you're interested, we could do a before | after recording. I use an old Sanderson machine to set the temperament and basic stretch, do unisons and "fine" adjustments by ear. Piano is a 1929 Steinert 6'10".

Good Day to All.

Hi Andrew, I have the software but, alas, I'm in Lincoln, NE... My fee for mileage would be a killer

I can tell you that you will not be disappointed in the software. I hope you can find someone that has OnlyPure in your area.

Quiet spectra, harmonic feeling as tending to do the splits under some circumstances (loss of focus)

But I have a special ear, probably.

(heard that on your samples, Scott)

I like it at the gutar, find it too "dry" at the piano.

Regarding the Stopper software, I have been doing a bit of experimenting with different temperaments/tunings for this short 4ft8in Weber Duo-Art Grand. It does not have the best tone to begin with, however, the Stopper software on my old HP PDA has the best sound for ET, so far. Very pleasing, especially with the bulk of pop music from the 1920's 30's, ET fits nicely with this genre. Classical sounds good to, but grandiose pieces just don't sound that good on such a short piano.

Here is a short video using just the mics from Canon vid cam. The tuning was about a day old. The piano has it's original 1930 soundboard and bridges, no work on the board other than some minor shimming years ago. The hammers are new, about a year old (Isaac Cadenza) The treble strings are at least 30 yeas old, bass strings, 12 years. (Isaac Profundo) The felt needs to be replaces...it's very stiff and is noisy. Given those variables the tone is not the best, however the sustain is quite remarkable, especially for such a short piano. I would like to replace all the strings and the felts in the future, and am also thinking about adding the Wapin modification, as it had such a positive effect on my M&H RBB.

http://youtu.be/_vdzE9EnKe0

All the recent Weber vids on there are with the Stopper software, the vid above being the one recorded soon after the tuning. The others are not as fresh. Also the piano was just moved here recently, and is not stable yet...change from Los Angeles all it's life, to wet Oregon...:)

I have always tuned by ear(starting out with a fork). I learned Equal Temperment.(35 years ago). It's always done the job. From the cheapest Whitney Spinet to the Consert Steinway Grand, and I have NEVER, NOT ONCE been told my tuning sucked. I have thousands of repeat customers. But I tune my OWN piano, and I am my own worst critic, and I want to enjoy my own piano the way I want it to sound. I'm sticking to Equal Temperment. If it ain't broke, don't fix it!

"I don't know what this thing is that you're talking about, but I'm sure about one thing: I don't like it, and my way is better"

Good to see you here again, Phil - I agree.

Glad to see this thread still alive too. I'm waiting for the paper published on the basis of the Stopper Temperament.

As long as there are pianos that need tuning, and piano tuners who tune them(as well as wannabe tuners), there will be someone who comes along with some revolutionally temperment that will change the world as we know it. Good try