<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=iso-8859-2"> <META content="MSHTML 6.00.2900.2180" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV dir=ltr align=left><SPAN class=984575311-01102006><FONT face=Arial color=#0000ff size=2>Hello!</FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=984575311-01102006><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV> <DIV dir=ltr align=left><SPAN class=984575311-01102006><FONT face=Arial color=#0000ff size=2>I have an Excel scaling spreadsheet too, with a combined graph to show tensions, Z factor, inharmonicity etc in one place. I have never used it for actually rescaling a real piano, just to analyze scales.</FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=984575311-01102006><FONT face=Arial color=#0000ff size=2>If you want it, let me know (private mail). <P><FONT size=2>Calin Tantareanu<BR><A href="http://calin.haos.ro/">http://calin.haos.ro</A><BR>--------------------</FONT> </P></FONT></SPAN></DIV><BR> <BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px"> <DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left> <HR tabIndex=-1> <FONT face=Tahoma size=2><B>From:</B> pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] <B>On Behalf Of </B>Jason Kanter<BR><B>Sent:</B> marţi, 26 septembrie 2006 23:49<BR><B>To:</B> Pianotech List<BR><B>Subject:</B> Call for scaling spreadsheets<BR></FONT><BR></DIV> <DIV></DIV> <DIV><STRONG><FONT color=#008080 size=2>List</FONT></STRONG></DIV> <DIV><STRONG><FONT color=#008080 size=2>If any of you have and are willing to share your scaling spreadsheets - please send to me. In response to Ric Brekne's recent suggestion, I am offering to use my Excel skills to take a crack at making a nice, user-friendly, efficient graphing spreadsheet that we can all use to improve our study and understanding of this area of the craft. I will compile the best ideas and hopefully come up with something really useful.</FONT></STRONG></DIV> <DIV><STRONG><FONT color=#008080 size=2></FONT></STRONG> </DIV> <DIV><STRONG><FONT color=#008080 size=2>I don't presently know much about scaling, but I do know Excel and have access to the "Calculating Technician" Journal series where a lot of this was discussed.</FONT></STRONG></DIV> <DIV><STRONG><FONT color=#008080 size=2></FONT></STRONG> </DIV> <DIV><STRONG><FONT color=#008080 size=2>What do you measure, and what formulas do you apply, and what are the dependencies, constraints and limits? The parameters suggested by Ric include:</FONT></STRONG></DIV> <DIV><STRONG><FONT color=#008080 size=2></FONT></STRONG> </DIV> <BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px"> <DIV>Inputs:   </DIV> <DIV>Diameters </DIV> <DIV>lengths </DIV> <DIV>type of string material?</DIV> <DIV><STRONG><FONT color=#008080 size=2></FONT></STRONG> </DIV> <DIV><STRONG><FONT color=#008080 size=2>Outputs:</FONT></STRONG></DIV> <DIV> <DIV>inharmonicity </DIV> <DIV>tension</DIV> <DIV>breaking point % </DIV> <DIV>frequency.</DIV> <DIV><STRONG><FONT color=#008080 size=2></FONT></STRONG> </DIV> <DIV><STRONG><FONT color=#008080 size=2>For bass strings:</FONT></STRONG></DIV> <DIV><STRONG><FONT color=#008080 size=2>how do you deal with wrapping?</FONT></STRONG></DIV> <DIV><STRONG><FONT color=#008080 size=2></FONT></STRONG> </DIV></DIV></BLOCKQUOTE> <DIV dir=ltr><STRONG><FONT color=#008080 size=2>And since we will no doubt be looking to improve scaling, what kinds of what-ifs would you like to automate?</FONT></STRONG></DIV> <DIV dir=ltr><STRONG><FONT color=#008080 size=2></FONT></STRONG> </DIV> <DIV dir=ltr><STRONG><FONT color=#008080 size=2>I am proposing this as a volunteer project, the output to be freely available. Maybe that idea creates difficulties since it might "compete" with commercially available programs. If that's an issue, let me know and we'll think about it.</FONT></STRONG></DIV> <DIV dir=ltr><STRONG><FONT color=#008080 size=2></FONT></STRONG> </DIV> <DIV dir=ltr><STRONG><FONT color=#008080 size=2>Jason</FONT></STRONG></DIV></BLOCKQUOTE></BODY></HTML>