Piano acoustics

[Don]

Hi Ric,

I do agree that an ETD will give different results in such measurements.
One might instead of using a quartz crystal type sound producing device use
a tone bar with a striker. The problem with measurements in a piano is the
method by which the string is excited. It is very difficult to strike the
key in an identical manner 5 times in a row. I do wish someone with access
to one of the diskclavier style actions would try to do some measurements.
There was one study done a while ago and I did post the url to the list.

The accuracy of the best EDT's is not at question. The method of using them
for measurements *is*.

At 12:38 AM 2/7/02 -0600, you wrote:
>I have no doubt you are measuring differences of inharmonicity.

<snip>
>the machines are not consistant with inharmomicity readings then
>they could be compared to reading the fundamental of  a sound or tone
>source such quartz digital instrument, or the shortwave broadcasts.  An
>experiment with one ETD yielded wild results in FAC type measurements, but
>no detectible differences between repeated measurements of an audio tone
>(fundamental) from an electronic digital source.  ( a Korg Digital Tuner
>DT-1 from about 1987).  From that I conclude the ETD, (a share ware version
>of TuneLab97) and the Korg are extemely stable in producing and detecting
>the fundamental.   ---ric
>
>
>----- Original Message -----
>From: Don <pianotuna@accesscomm.ca>
>To: <pianotech@ptg.org>
>Sent: Tuesday, February 05, 2002 10:49 AM
>Subject: Re: Piano acoustics
>
>