DC Study

[G GRAVINA]

Patrick, Matt, List:

I searched the Journals on CD and found an article by Don Galt in the July 
1979 issue in which he reports his findings of humidity-related pitch 
fluctuations in one piano over a period of several years.  Interesting 
report.  (Matt, you might want to read this.)  But I didn't find anything 
with two pianos, one with a climate control system compared to one as a 
control.  Did I miss something?

I also searched for articles re: DamppChaser and came up dry (sorry!).

There must be some independent data out there somewhere.

Jerry Gravina, RPT
Babylon, NY


>I think one would first start by reading the available literature, 
>starting with articles in the Journal. There was an article by Don Galt a 
>few decades ago in which he tracked humidity and pitch variations between 
>a "control" piano (ie no system) and one with a DC system. I think they 
>were the same model, in school practice rooms. There were more recent 
>articles, some written by DC principals. It's pretty clear that they use 
>good methodology.
>A couple years ago Roger had a "data loggers" demo at the CyberCafe (last 
>day of the Institute). There's very sophisticated, very reasonably priced, 
>equipment for tracking humidity and temperature at a wide range of 
>intervals (from seconds to weeks between  readings), with accompanying 
>software [PC only, not for Macs :(  ] which can graph the data.
>I'm sure Roger would be willing to share the details with someone 
>interested in reduplicating his studies. On your own dime, no doubt. 
>Perhaps a good science fair project for your kids, or a research project 
>for a wood technology major.
>
>Patrick Draine