Unison Flatter than each Individual string?

[jolly roger]

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The effect is also less noticeable on the notes directly above a rib, and 
most prominent at the mid point of the rib positions.
The two sample pianos were a D and a SD10 in both cases it was < .2 cent 
pitch drop Test only done in Octave 6.  So no conclusions on my part.

Roger



At 06:51 AM 8/14/02 -0500, you wrote:

>>I believe the right explanation should be approved by
>>experiment.with out any experiment,here is my
>>assumption for the phenomone:
>
>Baoli,
>I explored this some a year or so ago, and found an interesting 
>correlation. Very often, taping off the rear duplex of the section 
>eliminated the pitch drop when the second string was tuned in.
>
>
>>if you shift to another partial(meaning you measure a
>>different partial of the same note)the rare phomonene
>>will probably disapear.Or if you lower the pitch a
>>little bit the phomomee should disapera also.
>
>Not all that rare, from my experiments. The pitch rise happened about as 
>often as unisons that didn't change pitch - at least in the piano I 
>sampled in the shop. I didn't think to try measurement of different partials.
>
>
>Ron N


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