Clyde, <<I wouldn't expect a 7% humidity increase to make *that* much difference. But if you had several dry days before the April 6 tuning and several very humid days before yesterday's tuning, that could have a substantial impact on the pitch of the piano.>> I was suspecting that this was the case, but since I did a pitch raise in April, and there was so much of pitch change by July, it must have been that way. Anyone know of a hygrometer that logs RH measurements over a period of a year...for less than $50? ;-) John Formsma Blue Mountain, MS mailto:jformsma@dixie-net.com
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