On Dec 12, 2009, at 8:25 AM, Don wrote: > Hi Fred, > > And what was the relative humidity? Had it changed too? > > Did you see a pattern in the unison smearing? I.e. was the bass side > of the > unison out in a different pattern than the treble side of the unison? I did not measure it. I glanced at the dial humidistat on the wall (a pretty accurate one) and it said around 20%. I have no reason to suppose it had changed significantly (although I assume when the temp went down, the RH went up a bit, as the actual air in the building wouldn't have circulated much: no HVAC system, just a gas heater suspended from the ceiling). The piano has a full DC system installed. No unison smear pattern, just random tweaking needed. Most unisons needed nothing. Regards, Fred Sturm University of New Mexico fssturm at unm.edu
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