SAT use

[David Ilvedson]

I agree with that.  I often come across bass unisons where I would have to tune one string quite a bit higher to get in aurally in reasonable tune with its neighbor.  With the SAT I can compromise both strings to get the same aural tuneness.  For instance, lower the left string a cent and bringing up the right a cent instead of the left string right dead in tune according to the SAT and the right string being 2 cents higher for aural in tuneness.  I have run into having to raise the left and lowering the right to get a good aural unison.

David I.



----- Original message ---------------------------------------->
From: Kent Swafford <kswafford@earthlink.net>
To: Pianotech <pianotech@ptg.org>
Received: Mon, 30 Sep 2002 17:46:05 -0500
Subject: Re: SAT use


>On Monday, September 30, 2002, at 09:29 AM, Ron Koval wrote:

>> But going down into the wound strings, the machines have trouble,
>> because mostly they are only listening to a single partial.  Our ears
>> just search for what is "least bad", when working on everyday
>> instruments, where the partials of a pair don't exactly match.

>Most every piano has bass strings with partials that don't match
>exactly. An ETD can be a very useful tool to help zero in on the "least
>bad" tuning of the unison; in other words, I don't entirely agree when
>other techs say "bass strings must be tuned aurally only". Tuning
>unisons in the bass is like every other part of tuning -- there are
>visual techniques that can be combined with aural techniques to provide
>superior results.

>I'm teaching an advanced tuning class at TSA next week. Bass unisons
>will definitely be covered. Hope some can come.

>Kent Swafford

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