Arlie, The simple, but not helpful, answer is that if the piano is structurally sound, then the problem is caused by an external factor. Regards, Clyde Arlie Rauch wrote: > Yamaha studio pianos are some of my favorites. However, a nursing home here bought one maybe three or four years ago that is horribly unstable. It's serial number is P22 246672. > > The tuning pins actually feel pretty good, and after tuning the piano sounds great. But a month or so later it'll be way off again. A Story and Clark Classic Player in the same room and not much older actually maintains its pitch better. The room serves as meeting room and dining room. > > They had been moving the piano frequently, and I encouraged them to find a good place and leave it there, and they complied. That has not resulted in a noticeable improvement. > > In my experience this is unusual for a Yamaha. I'm just wondering whether anyone thinks that a humidity system would improve the situation. > > Arlie Rauch > Piano Technician > Glendive, MT
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