<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META content="text/html; charset=iso-8859-1" = http-equiv=Content-Type> <META content="MSHTML 5.00.2314.1000" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>How do I know if I'm tuning a 2:1, 4:2, = or 6:3 octave? And why are they used in different places.  How do I know = when to use which one?</FONT></DIV> <DIV><FONT face=Arial size=2>Sorry to be so elementary, but I know = the terms and what they mean.  I just don't know when to use one in place of another.</FONT></DIV> <DIV><FONT face=Arial size=2>(I may know this, but I just don't know = if I know it!)</FONT></DIV> <DIV><FONT face=Arial size=2>Thanks for any advice</FONT></DIV> <DIV><FONT face=Arial size=2>Gary = McCormick</FONT></DIV></BODY></HTML>