[pianotech] Tunic Onlypure Tuner

[Jeff Deutschle]

Mr. Brekne:

I have researched the many threads in the archives regarding P12th
tuning and also Mr. Stoppers tuning. There is a feature of P12th
tuning that seems contrary to “Modern Tuning Theory”. Supposedly,
fifths become wide of just intonation in the higher treble. But it
doesn’t seem possible to have wide fifths and also have pure 3:1
twelfths. Can you comment on this?

On Fri, Mar 6, 2009 at 11:43 AM, Richard Brekne <ricb at pianostemmer.no> wrote:
> Thats because he's imposing a very pre-defined tuning priority on each
> instruments own inharmoncity, and a priority that actually works. You could
> call it a very strictly defined stretch, which is why there are no stretches
> to select from.  Or you could think of in in terms of the alignment of
> coincident partials he ends up with, which is centered around the P-12th and
> a temperment based on a P-12th interval instead of an octave.
>
> Assuming that a particular alignment of coincidents for a given set of
> intervals imposed on any pianos inharmonicity results in a very fine tuning
> each and every time.. then implementing this on an ETD is a straightforward
> affair for those with the programing skills to do so.
>
> We have always thought in terms of Octaves, and struggled to find octave
> matchings that work and find that we need to change which octave types we
> place most weight on for each piano and for each area of a piano.  With
> 12ths you really need to concern yourself with only  3 types. 3:1, 6:2 and
> 6:1.  From about D3 upwards you can confine yourself to the 3:1 and there
> isnt a piano on the planet that will not end up sweet as can be with that
> imposed assuming an appropriately tempered 19 semitones with the outside two
> tones being a perfect 12th to start with.
>
> The bass wants some degree of stretch no matter which way you work it... so
> you will have to choose where to move from 3:1 to 6:2 or 6:1 to put it in
> terms of coincidents. One could alternatively choose the best middle road
> for all three.  In anycase... in all but the most pitifully scaled and
> dinkiest of instruments... this works great on every single instrument you
> come across.
>
> Cheers
> RicB
>
>
>   One of the very interesting - as of yet unmentioned - aspects of
>   this new software is that it is the FIRST, that I know of, where the
>   developer claims that no aural tweaking is needed to get to a "fine
>   tuning".
>
>   Hmmmm??
>
>   Ron Koval
>
>   Chicagoland
>
>
>
>



-- 
Regards,
Jeff Deutschle

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