I don't think you can discount an extreme reaction to a large swing in humidity. I have experienced big pitch changes, frequently starting at the bass-to-tenor break, as well as in the upper treble. It seems to happen in lower quality instruments. Patrick C. Poulson Registered Piano Technician 530-265-1983 -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20121028/d5213568/attachment.htm>
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