At 17:01 -0400 12/10/2010, PAULREVENKOJONES at aol.com wrote: >...I can see the argument for mimicking the string plane curve (maybe)... Well, can you or can't you? And if you can, how and why? I can send you a few sample Steinway strike height curves if you like and you can tell us how on earth they can be mimicked in the key levels. The way I understand it (and I too am open to correction) is that the key bottom (sic, NOT 'key bed') of the Steinway is arched at the front (only), being one millimetre higher in the middle. When the key blocks are screwed down, the front rail is bent to follow this very slight curvature and to press closely against the key bottom so that there can be no knocking of the front rail against the key bottom. The keys are raised to follow this curve and, in an ideal case, the total thickness of the punchings required under the front baizes will be the same throughout the scale. JD
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