<div>Hi John, list,</div><div><br></div>I'm guessing something is lost in translation. I'm hopeful that a technician with any education doesn't believe whapping the piano strings with a tennis ball in any way increases the potential energy of the system. I interpret it as did Ryan, basically another method of seating strings on (into ;-] ) the bridge. Probably less aggressive than I've seen many folks do with wooden dowels or brass rods.<div>
<br></div><div>William R. Monroe</div><div><br><br><div class="gmail_quote">On Fri, Sep 30, 2011 at 7:59 AM, John Formsma <span dir="ltr"><<a href="mailto:formsma@gmail.com">formsma@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Yeah, right. :) I'm not agreeing that you can put energy into a soundboard with a tennis ball. I mean, yeah, you can, but it comes right back out. Just like when a hammer hits a string. Nothing gets stored like in a energy reserve.<div>
<br></div><div><font color="#888888">-- <br><div>John Formsma, RPT<br></div><div>Blue Mountain, MS</div><div><br></div><br></font><div class="gmail_quote"><div class="im">On Fri, Sep 30, 2011 at 4:18 AM, Gregor _ <span dir="ltr"><<a href="mailto:karlkaputt@hotmail.com" target="_blank">karlkaputt@hotmail.com</a>></span> wrote:<br>
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Here is a cutout of an interview with Stefan Knüpfer about that question:<br></div><div class="im"><b>Basicaly it says this in English:</b><br><br><br>Why to use a tennis ball in a grand?<br>Long time no play, piano is like sticked in the mud, it needs energy to move and swing free again. The idea is to put energy into the soundboard not via the action but from above with the aid of a tennisball of a jig saw. It knocks the piano beautyful soft and it gets a free tone.</div>
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