[pianotech] Interesting action on Yamaha YUA

[Ryan Sowers]

It plays well at very low levels. I uploaded a short video clip showing at
which point the note stops playing. Of course with the computer its a little
hard to compare with real life, but it seems to play at very quiet levels
better than most uprights.

http://www.youtube.com/watch?v=9dBfDkw8Jc8

It is also an example of my new minimalist composition. Enjoy...

On Tue, Jul 7, 2009 at 4:40 PM, Ed Sutton <ed440 at mindspring.com> wrote:

>  Ryan-
>
> As you play more and more softly, every action reaches a failure point
> where the response becomes erratic, so there is a limit on how quietly you
> can play dependably. Alexander and I are wondering if this action is
> different from a standard Yamaha vertical action in this respect. Perhaps it
> repeats faster at a cost of less pianissimo response range?
>
> The purpose of weights in the back of vertical keys is usually to get the
> key back down so that the jack can reset. If you add keyweight to increase
> touchweight, you are pumping lead that doesn't do anything to the overall
> action response. If you add a small amount of weight to the hammer, it will
> increase the dynamic touch of the piano, and perhaps improve the sound as
> well, even thoughj the static downweight will still measure low.
>
> Ed
>
> ----- Original Message -----
> *From:* Ryan Sowers <tunerryan at gmail.com>
> *To:* pianotech at ptg.org
> *Sent:* Tuesday, July 07, 2009 6:12 PM
> *Subject:* Re: [pianotech] Interesting action on Yamaha YUA
>
> It does have a very light touch. I just took some downweight measurements
> and it's around 43-45 grams. Upweight is around 23 grams so the friction is
> around 10. I'm contemplating adding some weight at the back of the keys but
> I kind of like how it plays. If somebody is looking for a light action this
> would be the one.
>
> Alex: I don't understand your analogy to the grand action and feeling of
> lack of gravity. When you refer to spring tension being neglibible, do you
> mean the hammer return spring or the jack spring?
>
> On Tue, Jul 7, 2009 at 10:49 AM, Alexander Lass <lasspiano at gmail.com>wrote:
>
>> Ed,
>>
>> This is the first question that came to mind when I saw the design.  To
>> make it analogous to a grand action, I think the feeling would be similar to
>> not having any gravity acting upon the hammer assembly until the point of
>> let-off.  Perhaps the spring tension is such that any sensation is
>> negligible, but it does pose an interesting question.
>>
>> Ryan, any thoughts?
>>
>> Alex
>>
>>   On Mon, Jul 6, 2009 at 9:38 PM, Ed Sutton <ed440 at mindspring.com> wrote:
>>
>>>  Ryan-
>>>
>>> What is the effect on pianissimo playing?
>>>
>>> Ed Sutton
>>>
>>
>
>
> --
> Ryan Sowers, RPT
> Puget Sound Chapter
> Olympia, WA
> www.pianova.net
>
>


-- 
Ryan Sowers, RPT
Puget Sound Chapter
Olympia, WA
www.pianova.net
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