capo-hardening?

[jolly roger]

Hi Fred,
              It has to do with the internal damping characteristics of the
material.  How much energy is absorbed at the termination point and how
much is reflected.   A personal observation.  V Pro plates seem to be a lot
heavier than the sand cast counter parts.   If I knew the composition, then
we could find out just what the compression strength of the material
really is.
The change in material is far from being minor.   It's almost like
comparing copper with brass,  when comparing all the characteristics of the
two materials.
I know Baldwin did some comparison test's in the late 70's  early 80's,  (I
think it was on the Model L grand)  that comfirmed the tonal loss.

Regards Roger 



>jolly roger wrote:
>> Acoustically it may be noted that
>> companies using the V Pro process, will also sand cast the plates of their
>> premium models.   Draw you own conclusions.
>> 
>> Roger.
>
>Roger,
>	This really puzzles me. As far as I can see, the only acoustic function
>of a plate is to provide good termination where there is a capo (leaving
>aside design considerations like angles of deflection). Other than that,
>it's function is purely structural. I can't see where minor changes in
>composition would have an acoustic affect on anything other than
>termination. Do you? Might the reason they sand cast premium models be
>the fact they don't need enough of them to be worth the enormous set up
>expense for v pro? (My understanding is v pro is less expensive
>somewhat, but only with high volumes.)
>Fred Sturm
>University of New Mexico
>