----- Original Message ----- From: <Tvak@aol.com> To: <pianotech@ptg.org> Sent: October 06, 2002 7:44 PM Subject: L.O.S.S. > Why is it that some strings on a piano exhibit Lack Of Sustain Syndrome? I > prep new pianos at a local dealer and I find that there are unisons in the > treble (octave 5 or 6) that have notably less sustain than their neighbors. > I'll be tuning along, each note singing, DINNNNNN, DINNNNNN, and then I come > to its neighbor, DINK. > > There are some things we can eliminate, like the damper not lifting, or the > hammer double striking or blocking against the string. These pianos have > been regulated from square one (key height and dip). The strings have been > seated to the bridge and there are no false beats whatsoever. It's not my > unison tuning because it can be heard in the individual strings of the > unison. They are also NOT low quality Asian imports. No, it's not your unison tuning. It's a soundboard design problem and you won't fix it with anything you do to the hammers or the action. Sometimes you can make it less bad.... > > If anyone has an idea, I'd be interested to understand why one perfectly good > brand new string vibrates better than the one right next to it. It probably doesn't. Most often this effect is attributable to soundboard resonances. Occasionally a plate resonance. Del
This PTG archive page provided courtesy of Moy Piano Service, LLC