capo-hardening?

[Fred Sturm]

Okay, maybe I didn't state my query precisely enough. I would call
sharp/round and thin/wide design issues associated with termination,
similar to angle of deflection. Hard/soft is associated with materials
and their treatment, but again a termination issue. 
	Plate ring/internal damping has to do with the plate being acoustically
inert - taking as little vibrational energy as possible from the string.
At any rate, all the sources I have heard from who seem to speak with
authority seem to be in agreement on this. And I can't see that the
metallurgic differences between v pro and cast iron would affect
acoustical inertness.
	In which case, as a choice of materials issue, it would boil down to
hardness of termination. And v pro seems quite good from that point of
view, at least in my limited experience.
	Am I missing something here? 
Fred Sturm
University of New Mexico

Richard Brekne wrote:
> 
> Well, lets see,,,, there has been discussion about internal damping
> charachteristics, plate ring, differences between hard /soft -- sharp / round --
> thin / wide termination points.... to name a view of the issues that have been
> thrown around.
> 
> What gets me is that absolutly none of the factories are willing to give you any
> real hard data about the different types of plates..
> 
> Fred Sturm wrote:
> 
> > 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
> 
> --
> Richard Brekne
> RPT, N.P.T.F.
> Bergen, Norway
> mailto:rbrekne@broadpark.no