Hi Wim, Possibly you are pounding too hard. Very small changes in humidity cause pitch instability in unisons. I've documented that on the ptg list. I wish I had better tools to analyse what is going on. Temperature (stage lights) as I'm sure you know can make huge differences very very rapidly. At 02:22 PM 4/10/2004 EDT, you wrote: > OK, what exactly is happening when a string goes out of tune. I know >about climatic changes that effect the soundboard. This causes the who >piano, or at least whole sections to go out of tune. I can accept that. But >I pride myself on setting the string and the pin. I am a pounder. On new >pianos, (at least new to me), and especially concert instruments. I beat >the daylights out the notes to get them to stabilize. But there are still >strings that go out. That is why we tune concert instruments numerous >times, with strings still going out. lights standing absolutely still. >But every time I tune it, the piano is "in tune" in that it hasn't changed >pitch over all, but there are at least 2 dozen strings that have "slipped." >They are 2 or 3 cents off. I'm not talking notes, I am talking string. The >right string of one note is 3 cents low, or the left string of another note >is 2 cents flat. Why is that? Why do just these strings go out, and not >the other ones? Am I still not pounding hard enough, or is the combination >of slight variations in temperature, combined with strings that maybe >weren't set right, causing this? Inquiring minds want to know. Wim Willem >Blees, RPT >Piano Technician >School of Music >University of Alabama Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T. mailto:pianotuna@accesscomm.ca http://us.geocities.com/drpt1948/ 3004 Grant Rd. REGINA, SK S4S 5G7 306-352-3620 or 1-888-29t-uner
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