<HTML>In a message dated 6/8/01 4:29:51 PM Eastern Daylight Time, cedel@supernet.com writes: <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">All I can add to this conversation is that I am 95% sure I heard Ernie Juhn say once that there is some sort of sound in some grand pianos that is the fault of the plate, and that there's nothing you can do about it. Regards, Clyde </BLOCKQUOTE> In the casting process, carbon and graphite forms as the iron cools, adding a damping quality to the iron. Sometimes these elements will "creep" away from thinner sections, such as a strut, or where a thin section (such as a strut) cools too quickly to allow a sufficient amount of carbon and graphite to form in the matrix. This will cause that section to "ring".  If that's what's doing it, you can find out by holding the strut firmly in your hand to see if the ringing lessens. I'm not saying this is what's going on in the piano you're having this trouble in. It could be something else. But this is often the cause of plate ring. Larry Fletcher Atlanta Chapter </HTML>