Hi Cy, It is more of a guestimate than a "formula" but it is based on the best measurements I can make over a period of time and does factor in humidity. In a "first strike" situation I have to rely on the clients (often faulty) recollections of when the piano was last serviced--and how much the pitch was changed at that time. That's why I prefer service records that are fastented to the piano. Often they don't give the type of data I would wish--but at least it nails down the time factor. At 04:30 PM 7/4/2005 -0400, you wrote: >Don Rose has a formula for how soon a tuning will decay after a >pitch raise, depending on how far you had to move it. --Cy-- Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T. Non calor sed umor est qui nobis incommodat mailto:pianotuna@yahoo.com http://us.geocities.com/drpt1948/ 3004 Grant Rd. REGINA, SK, S4S 5G7 306-352-3620 or 1-888-29t-uner
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