Disklavier

Dear Carol,

Thank you for your explanation. It is good that no one else (not even 
one) echoes a similar difference with their Disklavier piano between 
power on and off. Or, between their unit and a comparable non-
Disklavier unit. We may just be overly critical. More test plays is 
in order.

Regards,


--- In disklavier@y..., "Carol Beigel" <carolrpt@h...> wrote:
> Turning a Disklavier on and off should have no effect on the 
feeling of the 
> keys.  However, turning the Silent Mode on and off could.  When the 
Silent 
> mode is turned on, the let-off, or escapement is sooner.  That 
means the 
> hammers starts back to rest at a greater distance before hitting 
the string. 
>   However, Yamaha has gone to great lengths in designing a special 
hammer 
> jack that should alleviate this problem.
> 
> Probably the single most common cause of heaviness of the keys in 
an upright 
> piano is the balance hole adjustment of the key and the key 
bushings.  The 
> key pivots on the balance pin, like a see-saw, and often that hole 
is too 
> tight.  A good piano technician can fix this in about 20 minutes on 
an 
> upright piano and about one hour or so on a grand piano. A special 
tool is 
> inserted from the top of the key, and only the sides of this hole 
are eased.
> 
> Perhaps the three different pianos your sister tried needed this 
adjustment. 
>   Most piano technicians will regulate a U1 piano without even 
thinking.  
> Although the adjustment and procedure is identical for a piano 
equipped with 
> a Disklavier, many piano technicians are reluctant to take the keys 
out and 
> fix the problem.  Perhaps this difference was the piano regulation 
and had 
> nothing to do with the Disklavier.
> 
> Carol Beigel
> 
> 
> 
> >From: "bin_kuei" <bin_kuei@y...>
> >Reply-To: disklavier@y...
> >To: disklavier@y...
> >Subject: [disklavier] Does Disklavier mechanism change the fell of 
the 
> >action?
> >Date: Tue, 25 Jun 2002 00:07:22 -0000
> >
> >I took my sister (who plays piano for 30+ years) to a very nice
> >dealership in the Bay Area to check out MPX1Z (48" upright 
Disklavier
> >with silent mode) and MX1Z (48" upright Disklavier w/o silent 
mode),
> >both based on the U1. She noticed the keys are stiffer when the
> >Disklavier control deck is powered on. The keys become stiffer and
> >she needed to labor more. Not expecting this, I did a blind test 
and
> >she always knows when the power was on.
> >
> >We also tested the U1 and it was free of the stiff, heavy feeling 
she
> >sensed. We went back and forth among the three and roughly 
concluded
> >the U1 has the "cleanest" action followed by MPX1Z (Disklavier 
off),
> >MX1Z (disklavier off), MPX1Z (Disklavier on) and MX1Z (Disklavier
> >on). The action feeling of the MX1Z was so stiff that she could not
> >recommend it.
> >
> >Are the pianos not properly set up?  Can anybody shed some light on
> >what have we encountered? I do not play but did some research 
towards
> >our pending purchase. I know many people has mentioned the silent
> >mode changed the action due to a shank being moved in to block the
> >hammer. However, I do not recall any comments on the Disklavier
> >mechanism as a whole that changes the action feeling (for the 
worse)
> >vs. a U1.  Should these Disklavier uprights based on the U1 play
> >differently than the U1 at all?  Any Disklavier guru out there,
> >please help!
> >
> >Thanks,
> >Bin
> >
> 
> 
> 
> 
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