[pianotech] Piano Key Levelling

[Blaine Hebert]

At least in our southern California area it is common to see uprights 
with what looks like almost 1/4 inch of crown, plus the keys up far too 
high and with inadequate sharp height.  Apparently someone got it into 
their heads in the 80s that pianos needed lots of "crown" and a lot of 
uprights were done that way.

If you sight down a worn set of keys the key line is hardly a smooth 
downward curve.  There are better ways to get adequate dip in a set of 
shallow upright keys than over-raising the keys (shimming the balance 
rail comes to mind).

B. Hebert