>This non-"voicing" voicing is quite intriguing... In KC I did a test with a small group of techs. Using samples from Jurgen, we compared the original punching to Crescendo straight-sided and conical-cut punchings. The consensus was that the straight cut produced a slightly better tone than the original and the conical cut punching was better than that. However when we turned the conical punching over (narrow side on bottom) the tone diminished. So the orientation of the conical punching is critical. Which was why on those Asian uprights, I could notice a difference playing chromatically. A simple fix :-) However, conical punchings are not suitable for all verticals either. On a 3 y/o S&S S which needed the key travel to be increased I recommended the Crescendo punchings and made a test on C4. The piano owner was surprised how much the tone focused when the new punching was installed, "That wavering went away", she said. The action felt better too with a more positive landing to the key. All in a day's work in super-hero-land. Regards, Jon Page -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20080205/dcfb6417/attachment.html
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