DC and Tone

[dpitsch]

So if I'm reading this correctly, Kawai's need a drier RH, Yamaha's more wet?
Interesting.  I wonder what the reason is!

Don wrote:

> Hi all,
>
> I have a client who is lucky enough to have to Kawai GS60 (6'9") with
> consecutive serial numbers. Both are equipped with full DC systems (i.e.
> three drier bars per instrument). The controllers were fighting each other
> so I disconnected one controller and ran the system from one piano to the other.
>
> This winter the *second* piano some how became unplugged (while the owner
> was busy having a heart attack). The tone color of the unplugged humidifier
> instrument was much *thinner*. I plugged it in and the tone has returned to
> where it was before.
>
> At 11:00 AM 3/7/98 -0700, you wrote:
> >
> >Just recently (a week ago) I installed a "wet" humidistat which centers
> >humiditiy at 48% RH instead of the usual 42%. My customer who has an
> >unusually fine Yamaha CF about 20 years old but rebuilt is always looking
> >for more power and carrying power. To our amazement the piano went out
> >of tune but the carrying power increased another major amount. My customer
> >had suspected that the tone got better when we had rainy seasons. I think
> >I'm convinced now. The customer momentarily is ecstatic.
> >
> >What do some others of you think who have experienced this kind of change?
> >
> >My present thinking is that the board has pushed up a little stronger
> >against the strings and that the impedance between strings and board has
> >changed enough so that there is more resistance of the board to the
> >energy of the string's downward pressure and that this causes the duration
> >to increase, but I can't understand the greater power also.
> >
> >Jim Coleman, Sr.
> >
> >
> Regards,
> Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T.
> "Tuner for the Centre of the Arts"
> drose@dlcwest.com
> 3004 Grant Rd.
> REGINA, SK
> S4S 5G7
> 306-352-3620 or 1-888-29t-uner