Hi Duncan, I also mark down humidty and pitch on each tuning. I live in an area where humidity fluctuates from 4% to 84% on a yearly basis. Pitch at A4 changes can be very dramatic. I have measured as much as a 40 cent pitch change at A4 (A450) (10 hertz), but I have never seen a string break from this change. At 06:07 AM 05/11/2001 +0200, you wrote: > Hi Don, >>I don't think I have ever seen a pianos pitch rise enough due to >>environmental changes for it to break strings. Has anyone else? >> > >Now, when the pitch is about 444 Hz or above (It depends on the type of >piano !), I will lower the pitch. >Here in Holland, the humidity in the air can be quite high. >It is not uncommon for piano's , including the brand new ones, to rise or >drop ,up to 4 Hz. That can be enough to cause a string to break ( I'm >talking about the highest wound strings) , which occasionally happens in >spring and the begining of summer. >For tuners who donot always necessarily tune to 440 Hz, this is something to >take into consideration. > >Duncan Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T. Tuner for the Saskatchewan Centre of the Arts mailto:drose@dlcwest.com http://donrose.xoasis.com/ 3004 Grant Rd. REGINA, SK S4S 5G7 306-352-3620 or 1-888-29t-uner
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