New Yamaha C-1 "swoosh"

[Avery Todd]

David,

Several years ago, there was a discussion about using a hair stylist's
electric razor to do this. Sorry I can't remember when but it seemed
like a good idea at the time. Anyone remember?

Avery

At 06:55 AM 02/24/02 -0800, you wrote:
>The best way to reduce the noise to a minimum is to trim the trichord split
>dampers where the felt protrudes below the strings.  Anything below the
>bottom of the string is a waste and serves no purpose.  Use a very sharp
>pair of small cosmetic scissors and don't hurry.
>
>David Love
>
>
>----- Original Message -----
>From: "Gary Mc" <gmcc@charter.net>
>To: <pianotech@ptg.org>
>Sent: February 24, 2002 6:38 AM
>Subject: New Yamaha C-1 "swoosh"
>
>
> > I'm aware that Yamaha grands make a soft swoosh sound when using the
>sustain pedal, caused by the trichords brushing the strings as they lift.
> > A customer has a new C-1 in a room with wood floors and  high ceiling. In
>the ceiling over the piano, looks like a glass bubble with an art design on
>it .So the acoustics in the room are very poor to begin with...In discussing
>the problem, I stuck my head under the lid,  and while talking it seemed
>like someone turned the reverb knob up a few more knotches.  So I think what
>she is hearing, in addition to the swoosh, is the sound of partials becoming
>active as the trichord brushes the string, because indeed, when you press
>the pedal, there is a series of a tonal scale, not loud, but definately
>audible.  Any suggestions on what to do?
> > And I've not studied this, but why does this occur on Yamaha's and not
>Steinway or Baldwin?
> > Thanks for any help
> > Gary McCormick
> >
> >