Keys and MOI

[Richard Brekne]

Hi Jim

I agree one hundred percent really. It would be a nice thing to have, as
long as it was quick, easy, and straigntforward. A few of us are working
on a device that Mark Davidson suggested for measuring key inertia. If
that pans out then we really have pretty much all we need, because the
Hammer MOI can likely be approximated nicely enough by just figuring the
hammer itself as a point mass and adding it to an averaged shank figure. 

My point is tho that if we know already ahead of time, what approximate
key lead mass at what placement yields a given MOI range, and can do the
same for the hammer... then we really dont need to measure or figure MOI
directly each time. It can be taken as a result of a given mass and
placement.

Maybe Mark will find this a good time to make public his key MOI
measureing device. Open sourced... we can collectively refine it to a
useable and easy to build yourself tool. That way more of us can work on
this puppy 

Cheers
RicB

Jim Busby wrote:
> 
> Ed, Ric,
> 
> I'm with Ed. If one can feel a difference between keys then why couldn't
> a device measure "it". (The difference, moi, or whatever you care to
> call "it") Ric, you said a device isn't necessary, but it seems that it
> would be a wonderful thing to have! If we could measure "it" as easily
> as we measure dw, uw, etc. then we could even out the moi to the point
> where the pianist could not feel any irregularities in touch. Isn't this
> the "Holy Grail" we're seeking, if not approaching?


> I discussed all this with our head physicist here and he seems to think
> a device to measure moi at the key wouldn't be all that hard to make. He
> said it might not need to quantify as much as it would need to show this
> key has x amount and give some kind of gauge to compare keys and even
> out the moi. Ric, you are light years beyond me in your knowledge of
> this, but why wouldn't this be a good thing? Or why don't you think it's
> possible and/or necessary? Maybe I'll have to wait for Spurlock to put
> one out :-)
> 
> Thanks,
> Jim Busby
> 
> _______________________________________________
> caut list info: https://www.moypiano.com/resources/#archives