[pianotech] Aurally pure octaves

[Jeff Deutschle]

Ed:

Thank you for the reply.

I know the 3:1 test that you mention and also a 6:2 test for beatless
12ths, but Mr. Stopper has repeated many times that his 12ths are not
beatless but at a “sweet spot”. I am hoping to learn what the aural
tests for this “sweet spot” are.

I’ve been playing with octaves that have equal beating 4:2 and 6:3
partials which result in an inherent 2:1 beat; meaning that the iH of
the piano inherently requires a certain beat rate of the wide 2:1
partials when the wide 4:2 partials beat at the same speed as the
narrow 6:3 partials. My biggest problem is that I tune few pianos that
have a clear enough tone to ghost the partials (the RBI tests aren’t
accurate enough for this) and have a pinblock capable of a very fine
tuning. If I like the sound, I hope to be able to hear it directly and
tune it without ghosting or first finding this inherent beat rate
first by ghosting. Of course this inherent beat rate will not be the
same for all octaves.


On Wed, Apr 15, 2009 at 12:02 PM, Ed  Sutton <ed440 at mindspring.com> wrote:
> Who can question words like "Pure" and "Natural?"
> ["I tune impure octaves by listening to unnatural beats."]
>
> I'd like a simple, carefully crafted demonstration where several people tune
> their favorite octaves on a variety of pianos (A2-A3-A4-A5), and we record
> and measure the tunings.
>
> Then we might find out something specific that we can name and reproduce.
>
> Ed S.
>
> Jeff-
> To check a pure 12th, use the use the M6-M17 test, thus, for example:
> F3-D4=F3-A5. The beat of the sixth is very clear, and the seventeen should
> beat the same.
> ES
>
> ----- Original Message ----- From: "Jeff Deutschle"
> <oaronshoulder at gmail.com>
> To: <pianotech at ptg.org>
> Sent: Wednesday, April 15, 2009 7:33 AM
> Subject: Re: [pianotech] Aurally pure octaves
>
>
> Kent:
>
> What are the "associated aural checks" for PureTuner? I continue to
> wait for Mr. Stopper's explanation.
>
> On Tue, Apr 14, 2009 at 11:35 PM, Kent Swafford <kswafford at gmail.com> wrote:
>>
>> Hey, this could be good. How about if you come in and do a tuning concert?
>> (Don't know what piano we'll have.) And then as time allows I can break
>> out
>> 'PureTuner and its associated aural checks.
>>
>> I know I will learn much; I can't wait.
>>
>> Kent
>>
>>
>> On Apr 14, 2009, at 6:42 PM, David Andersen wrote:
>>
>>>
>>> On Apr 14, 2009, at 3:05 PM, Kent Swafford wrote:
>>>
>>>> I came away more convinced than ever that whole sound tunings and
>>>> OnlyPure Tuner tunings are chasing after the same muse. I must say at
>>>> this
>>>> point that I think whole sound tuners can learn much and bring more
>>>> reliable
>>>> results by incorporating 'PureTuner techniques.
>>>>
>>>> Care to compare notes at Pianotech Live in Grand Rapids? 8^)
>>>
>>> Absolutamente, mi amigo. My mind is open and humbly excited to learn....
>>>
>>> DA
>>>
>>>
>>
>>
>>
>
>
>
> --
> Regards,
> Jeff Deutschle
>
> Please address replies to the List. Do not E-mail me privately. Thank You.
>
>
>
>
>



-- 
Regards,
Jeff Deutschle

Please address replies to the List. Do not E-mail me privately. Thank You.