Terry. We are talking about a major German piano manufacturer whose efforts and financial expenditures into this matter extended over quite a bit more then a single <<shot in the dark>> as it were. I really rather think they tried many many combinations of things, as such places usually do. And after these several years of experimentation they couldnt get the sound they were after... they went back. Yamaha as also spend enormous amounts trying every conceivable thing before arriving at their own CC variant. Curved ribs or not its a CC board by and large. Petrof believes that a tapering in the middle of the flitches before glueing together the panel is imperative to creating the right kinds of insternal stresses for their panels. And they have some measure of scientific data to support their theory. These people are not just blokes with a shop back in some inexpensive worn down industry district struggling to make ends meet from piano to piano. Nor are they ignorant as to how to go about experimentation into such matters. The fact remains they went into a long period of experimentation with RC & S boards and dropped it because they didnt like the sound they were getting. And hey !!! What does that prove except that there IS actaully a discernble difference in resultant sounds for different constructions (as if that should really be a suprise) and that these particular folks had tastes that went in the direction of a CC board. ? Whats so problematic about that ? Cheers RicB SNIP > I can't > comment on the Schimmel experiment because there are many variables to > consider and who knows what they did exactly. > > David Love That's exactly correct David. Was the only thing changed rib crowning and panel drying? What about rib dimensions? How about panel thickness and grain angle? How about rib array? Rib tapering? Many factors that we don't know may have contributed to a someone not liking the result of any particular piano.
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