<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; = charset=US-ASCII"> <TITLE>Message</TITLE> <META content="MSHTML 6.00.2800.1226" name=GENERATOR></HEAD> <BODY style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; BACKGROUND-COLOR: = #ffffff"> <DIV> </DIV> <DIV> </DIV> <DIV> </DIV> <DIV align=left>A double augmented 7th is actually a little wider than = a perfect octave. <STRONG>On the piano you can't make the difference of = course</STRONG> but B# is really one comma higher than C. </DIV> <BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px"> <DIV>And Dbb is one comma lower than C so no a diminished second is = not a perfect unison.</DIV> <DIV> </DIV> <DIV>Jean-Luc Matton </DIV> <DIV>Albuquerque NM<SPAN = class=170462800-14022004> </SPAN></DIV> <DIV><SPAN class=170462800-14022004></SPAN> </DIV> <DIV><SPAN class=170462800-14022004> </SPAN></DIV> <DIV><SPAN class=170462800-14022004>Jean-Luc,</SPAN></DIV> <DIV><SPAN class=170462800-14022004>    You're right, = in theory.  But I'm thankful that in order to save on ivory we have = few pianos that can accomodate the difference of a comma.  I think in = equal temp language we could define a Dbb as enharmonic to a C, or at least that they have = identical frequencies.   There were organs produced with more than 12 notes to an octave though = weren't there?  Mr. Hechler might have worked on some(?).</SPAN></DIV> <DIV><SPAN class=170462800-14022004></SPAN> </DIV> <DIV><SPAN class=170462800-14022004>Peter Lamos</SPAN></DIV> <DIV><SPAN class=170462800-14022004>Brunswick, GA  </SPAN></DIV></BLOCKQUOTE></BODY></HTML>