I have 2 studio Yamaha pianos that move around alot in pitch after I open them and I suspect the DC system. On one, I removed the dehumidifier bar and installed rear bars and a cover leaving the humidifier section inside the piano. It tunes like a champ now. James ----- Original Message ----- From: "Charles Neuman" <piano@charlesneuman.net> To: <pianotech@ptg.org> Sent: Thursday, March 21, 2002 11:53 PM Subject: tuning with Dampp-Chaser > Any strategies on tuning when there is a D-C installed? > > When I open the piano, the humidity starts to change. After a while this > affects notes I've already tuned. > > In my case, the humidity near the action of my vertical changes from 42% > to 36%. After a half hour or so of practicing setting a temperament, my > first notes have drifted a bit from where they were. I assume the humidity > change is the problem, but I suppose it could be how I set the notes. > > Do people run into this problem? If so, would you recommend leaving the > piano open for a while before tuning? > > Charles Neuman > >
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