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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