Hi Conrad, The concert hall here has a bit of an unusally cooling system. In the winter they draw outside air for cooling. Which causes the humidity to plunge, which within 15 mins causes the Steinway D to drift. They start this proceedure of cooling one hour before show time. Wow betide the tuner who isn't finished before the cooling begins. So I would disagree that humidity is *not* a factor. I would also disagree with Roger how ever. You can give repeateable phenomina predict what the wood will do. (Atleast to the tuning). At 01:58 PM 12/3/98 -0600, you wrote: >Well, Dr. Pangloss, a.k.a. Roger, > >At 13:22 12/3/98 -0600, you wrote: > >>Hi Conrad, >> The numbers would be good IF you had an absolutely stable >>bridge and sound board, I seriously doubt that you could relate it to cents >>because of this factor. >>I agree with all your points with regards to predictibility of coefficients >>to metals, since heat transfer is also and rate of expansion is >>predictable, but trying to predict lumber??????? in tems of cents, now that >>is a challenge. >>I'm smiling not picking. > >Wouldn't you say that in this best of all possible worlds, I could ignore >other confusing factors. (facts?) > >That said, in this situation the time factor (1/2 hrs?) involved would >pretty much eliminate any wood temperature expansion coefficient anyway. >Even over time, the dimension change of wood seems negligible. Methinks >the parameter which would be more critical to wood dimension changes would >be humidity spike induced by breathing of the audience. Even then, I don't >think there "wood" be enough time for even that to make a difference. > >Still smiling ;-} > > > >Conrad > >Conrad Hoffsommer mailto:hoffsoco@luther.edu >Luther College (319)-387-1204 >Decorah, Iowa 52101-1045 > >The best things in life aren't things. > > > Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T. drose@dlcwest.com http://www.dlcwest.com/~drose/ 3004 Grant Rd. REGINA, SK S4S 5G7 306-352-3620 or 1-888-29t-uner
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