SAT Accuracy, was: Piano acoustics

[Farrell]

The SAT, better than 1/10 cent. The 1/10 cent is easy because it is displayed in the window and you just more-or-less stop the rotating lights. You can go better than 1/10 by getting two sets of lights to brighten, and adjusting pitch to hold it there. Pretty hard to quantify at that point though - but lets say easily 1/20 a cent. I have heard folks saying 1/100 cent, but I'm not sure how they arrive at that exact figure - I don't really think you can quanify it like that when the result is based on a personal opinion of rotating lights.

Here ya go. Forget what I said, here it is from the manual @:  http://www.concentric.net/~Fast440/atm/atm.html#spec

CENTS RANGE:
-198 cents, to +160 cents with 0.04 cents accuracy throughout the scale .

CALIBRATION ACCURACY:
Built-in 440.00 Hz crystal frequency standard for self-calibration, accurate to 0.01 cents.


Terry Farrell
  
----- Original Message ----- 
From: "Richard Moody" <remoody@midstatesd.net>
To: <pianotech@ptg.org>
Sent: Friday, February 08, 2002 1:42 AM
Subject: Re: Piano acoustics


> 
> ----- Original Message -----
> From: Don <pianotuna@accesscomm.ca>
> To: <pianotech@ptg.org>
> Sent: Thursday, February 07, 2002 9:05 AM
> Subject: Re: Piano acoustics
> 
> 
> 
> | The accuracy of the best EDT's is not at question.
> 
> I am sorry, but this is what I am inquiring about.  How accurate are they
> and how is that determined?
> 
> ---ric
> 
> 
>