Hi Fred, Yes, especially as the results, at least in domestic and "church" pianos yield results like 1.6 cents pitch change on any note over a time frame of one year. I would say the narrower window would make all the instructors much happier, and that the piano tuner can do concert level work all the time. At 08:29 AM 5/10/02 -0600, you wrote: >Don, > I won't argue that it would be nice to have a narrower window for >"excellent," and that any change whatsoever in humidity will produce >tuning ramifications, but I'm not too sure we can actually achieve 10% >in many instances. If you think we can (and maybe a full system with >full covers does that), perhaps an "ideal" category of "within 5%" could >be added. My sense is that building systems are lucky to achieve better >than 15%. But having an "ideal" category, described as full system with >complete baffles, could be an incentive to spend the money for such >installations. >What do you think? >Fred > >Don wrote: >> >> Hi Fred, >> >> I have data that suggests that "if" a piano is allowed to stabilize that a >> 5% change in R.H. causes a pitch swing of 4 cents at A4. So I think your >> revision needs to have a much narrower window for "excellent" humidity >> control. >> >> Regards, >> Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., 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 > > Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., 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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