Will, Yes I was at Larry's but was focused on other things...I have a call in to him. But my question was a basic phsyics question, not an applied physics question. The "what I thought of the "xyz" piano" is premature . Let me state my wonder from an different angle. The traditional belly systems we are familiar with empirically function within what we assume to be an apparent overall system wide impedance level. The impedance being determined by rib beam strength, panel compression, bearing and its associated string tension, hammer velocity/mass/density, etc. We also find emprically, in the traditional bridge pin termination system that there are impedance levels below which the board, as Ron O, mentioned...does not function musically. In assigning impedance levels to various belly structures there is an implicit assumption, that assumption being that the relative efficiency of the pin termination, since its the only model we use in our empirical exercises, is not part of the impedance equation, or rather factored out because it is a constant. Its considered to be a "constant" because its the only model we use. So, my wondering was, if you take this "constant" in insert it into our impedance equation as a "variable", by using a different bridge termination system with efficiencies different than the pin termination, what effect does that have on the system wide impedance? How much of the impedance equation is actually accounting for force needed to make sure the bridge pin termination functions at adequate efficiency? Jim Ialeggio -- Jim Ialeggio jim at grandpianosolutions.com 978 425-9026 Shirley Center, MA
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