<html> <head> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; = charset=us-ascii"> <meta name=Generator content="Microsoft Word 10 (filtered)"> <title>Re: DC</title> <style>  </style> </head> <body lang=EN-US link=blue vlink=purple> <div class=Section1> ”the = thing is, soundboards, or real ones anyway, create the proper tone and curve at = 42% humidity.  the string tension against the board when strings are = tuned at 440cps., also is engineerd to the proper curve in the soundboard.  therefore, all soundboards should be kept at 42% relative humidty.  granted the DC systems are not the best way to do this, but by far = the practical way to, and are necessary and there are no different opions on = the subject because piano engineering is mathematical and physical = science. Armond”     There certainly are other options, = and at around the same price.  There are also options which will not = create a gradient in the way DC’s (at least in my experience) = do.     Jonathan Finger = RPT </div> </body> </html>