An addendum: If you are changing notes in the temperament, your committee also needs to listen to the rest of the piano to establish a new master tuning. Changes, particularly in the temperament, affect relationships throughout the piano (parallel 10ths and 17ths, octaves, double octaves, etc). I'm wondering if maybe the problem was in the original recording of the master tuning. It's recommended, for instance, that the midrange be recorded as soon as the committee agrees on it, then each section is recorded as it is complete. And that the midrange be re-checked for any drift at a couple points during the process. I have never experienced a problem of the sort that Avery describes. Fred Sturm University of New Mexico Fred Sturm wrote: > > This notion that the SAT "adjusts" tunings without being told to is, I > think, apocryphal. It is not an "active" machine. What's in memory is > simply in memory. The calculating function only happens when you > activate it, with some difficulty (sequences of key pushes that are > unlikely to happen by accident). > I guess it might be possible that some electronic/media corruption > could happen over time. If that should be the case, there's an easy way > to check whether the numbers in the memory have changed. You should have > a hard copy of the master tuning somewhere. Scroll through what's > recorded on the SAT and see if the numbers are the same as the hard > copy. > With respect to making any changes in a master tuning, definitely do it > by committee. > Fred Sturm > University of New Mexico >
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