Ron, I do have a piano I can abuse some and I might do some spectral analysis on that test. I know it will change from experience. However I want to know how it changes. Seems like adding a string would give the same effect as having a lower soundboard impedance (by increasing the string impedance) so the attack would increase and the sustain would decrease. As far as the wading into the info available, I think I'm at chest already. I have been scouring the archives for weeks. Have read as many of Del's articles as I can find on the 20 years CD (as well as taken several of his classes at conventions). Have on order Mcferrin's "The Piano - Its Acoustics" and Wolfenden's "A Treatise on the Art of Pianoforte Construction". As well as Reblitz and a few other of the standards. And I think I already been confused into harmlessness. Of course that should go away as soon as I start making a stack of loaded soundboard jigs to start some "speramentin" with some steel and wood and felt. Thanks for making the thread interesting folks! Kevin S. Riggs Associate, RTP NC chapter
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