Hi Jim I have never run into the studies you mention Chris presented. That said, I notice a change in piano sound as a whole between loose pining and appropriately tight pinning. That goes off in another direction however and has to do with the solidity of the hammers impact with the strings. Are you saying that Chis could demonstrate a difference in shank resonant frequency because of pinning differences ? In anycase, no... Steinway did not remove and check the pinning. The simply marked the bad shank(s) and replaced them. Given the uniformity of the pinning at that point in the manufacturing process, I'd doubt that pinning would be in the picture regardless. It would be pretty easy to look into what effect (if any) pinning could have on a shanks resonate frequency tho. Just do the same resonance block and do a before and after check. Cheers RicB Ric, Good info. Do you think, though, that it could have been other factors too? I mean, Chris Robinson did some studies that showed a marked difference in tone by the differences in pinning. (I think DS did this too?) Did your teacher actually take shanks off, tap them, etc. and prove this to your satisfaction, or was it just his theory? (Probably very well-educated theory, but if it ain't shown to me I'm kind of skeptical) Regards, Jim Busby
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