Terry, There's a limit to what you can do, so we just have to accept that. I used to remove the bottom board before tuning, check that the system is working OK, change the pads, whatever. Now I tune first in an effort to keep the humidity level in the piano as stable as possible. Not a perfect solution, but there aren't many of those in life anyway. Regards, Clyde Farrell wrote: > I tuned a fairly new Yamaha studio in a church recently with a DC dehumidifier. The pitch seemed to wander around quite a bit (4 cents or so) during a 5-cent pitch raise and a tuning. As soon as you open the piano up, everything is going to change. So you ask the church keeper to have the A/C set to their service temperature when the piano is played closed, and you need to open it to tune it. What is a tech to do??? > > Any thoughts or observations on this apparent problem?
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