[pianotech] interesting alternative tuning experience

[Ron Nossaman]

> You (and others) are quite right that I did not mention changes in 
> relative humidity.  The RH doesn't really factor into this phenomenon, 
> as it is individual notes, sprinkled here and there throughout the scale 
> that had been tuned at 30 to 50 cents sharp for eight years that have 
> crept back almost all of the way up after pitch-loweering and tuning in 
> ET at 440.  Other notes, in many cases right next to the aformentioned 
> notes, that had been near pitch or below for those same eight years had 
> behaved predictably after re-tuning.
> 
> Alan

It's coming from the back scale. Next tuning will be better, 
and the next. Short of lowering tension drastically and 
pulling on the back scale to force wire through the bridge, 
you'll just have to wait for it to settle down.
Ron N