<!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 6.00.2800.1106" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><STRONG><FONT face=Arial>Isaac mentioned;</FONT></STRONG></DIV> <DIV><STRONG><FONT face=Arial></FONT></STRONG> </DIV> <DIV>"One of the nicest tricks I learned with the different Us methods = is<BR>the 4:5 relation from contiguous thirds. ............"</DIV> <DIV> </DIV> <DIV><STRONG><FONT face=Arial>I tried this once long ago but was = flummoxed when it came to distinguishing the ratios. How on earth is one supposed = to tell aurally whether one beat rate is 25% faster or 20% slower than another = beat rate?</FONT></STRONG></DIV> <DIV><STRONG><FONT face=Arial></FONT></STRONG> </DIV> <DIV><STRONG><FONT face=Arial>AF</FONT></STRONG></DIV></BODY></HTML>