'lo, At 00:04 10/29/2002 -0600, you wrote: >Hi Alan, > >I tuned a Baldwin studio sized piano on Saturday at a church. When I was >done, the music minister came to check the piano out and rearranged the >stage. The piano was moved about 4 feet away from where it was when I >tuned it. When I rechecked the tuning, it was horrible! David V is right. Just take a 3x5 card and draw a big X on it. Now imagine that the lines of the X are piano strings on a vertical. Now curl one corner toward you. You can now probably imagine that a string running on the bias from that corner to the opposite would be shorter (flatter) than before, while the other direction strings (lying in the trough of the curl) would be virtually unaffected. David's knee was straightening out the card (i.e. strung back). Grand piano do not suffer this fate since they are [usually] on only three legs and, if you remember your solid geometry, three points in space determine a plane. It doesn't matter how uneven the floor might be. The grand plate (and tuning) is unaffected. Conrad Hoffsommer What? Me Worry? - A.E.Newman
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