<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; = charset=iso-8859-1"> <META content="MSHTML 6.00.2800.1276" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#d8d0c8> <DIV><FONT face=Arial size=2>Hi list !</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Can anyone explain me what is behind = those longitudinal waves ?</FONT></DIV> <DIV><FONT face=Arial size=2>Did I understand well that longitudinal = waves are movements of the string in the direction of the string itself = ?</FONT></DIV> <DIV><FONT face=Arial size=2>But how can you calculate them = ?</FONT></DIV> <DIV><FONT face=Arial size=2>How do they appear ?  (through = overcentering hammers ? or anyway ?) </FONT></DIV> <DIV><FONT face=Arial size=2>Do they affect tone ? how = ?</FONT></DIV> <DIV><FONT face=Arial size=2>Can you control this ?</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Stéphane = Collin</FONT></DIV></BODY></HTML>