[CAUT] Andres punching tested

[Richard Brekne]

Hi Eric

The two that come to mind are the sound of the impact on the keyboard 
itself, and how that figures into the total sound picture that is 
perceived, and the <<catapult>> suggestion. This later suggests that the 
end condition of the keystroke has an affect on how much energy input at 
the key is absorbed by that endpoint or reflected onwards through the 
system, and to some degree how whatever energy sent onwards is 
affected.  Others more familiar with the physics of things can get into 
a more formal discussion of possiblities in these regards, but I imagine 
that the release of any key flex incured for a particular blow is an 
interesting point to look at from more then one perspective.

I know, I know...there is this unroakable desire to equivilate piano 
tone with the actual collision conditions of the hammer and string.  But 
I think that alone is more complicated than that in itself ... as it were :)

RicB

Wolfley, Eric (wolfleel) wrote:

>I haven't heard any of the attempts to explain how firm frontrail punchings
>might affect tone...I'm curious since there's (hopefully) no connection to
>the frontrail punching during escapement or when the hammer hits the
>string...is it some kind of psychoacoustic phenomonem? Please elaborate.
>  
>



>~~~~~~~~~~~~~~~~~~~
>Eric Wolfley
>Head Piano Technician
>Cincinnati College-Conservatory of Music
>University of Cincinnati
>~~~~~~~~~~~~~~~~~~~
>
>-----Original Message-----
>From: Richard Brekne [mailto:Richard.Brekne@grieg.uib.no]
>Sent: Friday, January 14, 2005 2:00 PM
>To: College and University Technicians
>Subject: Re: [CAUT] Andres punching tested
>
>Erwinspiano@aol.com wrote:
>
>  
>
>>  Hi Fred
>>  They are stiffer than anything I've ever encountered & mostly
>>because it is not a woven cloth but a pressed felt. I've used the pear
>>green & I don't find them any different than any thing else except the
>>color is brighter. I'll check it out today with calipers
>>  Dale
>>    
>>
>
>
>I'd agree... yet there is an elasticity to them as well not encountered
>with other punchings... or so I seem to percieve these.  You get this
>really nice feeling of hitting a very solid bottom while also
>experiencing a very pleasant <<spring>> back upwards... nothing too
>dramatic mind you, but noticible and nice.  Then there is the
>unmistakable change in piano tone... harder to find an explaination for,
>but some of the attempts made so far seem to have some sense to them. In
>anycase its there.
>
>RicB
>
>  
>
>>Erwins Pianos Restorations
>>4721 Parker Rd.
>>Modesto, Ca 95357
>>209-577-8397
>>Rebuilt Steinway , Mason &Hamlin Sales
>>www.Erwinspiano.com
>>    
>>
>
>
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>