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<DIV><STRONG><FONT face=Arial size=2>No, they are the same note depending on
which system you use. Here we use the single note reference i.e. A1, Bb2, C40,
F45 etc. You might use the octave reference system which to me is confusing. You
guys over there went astray ever since the Boston Tea
Party!</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2></FONT></STRONG> </DIV>
<DIV><STRONG><FONT face=Arial size=2>AF</FONT></STRONG></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=avery1@houston.rr.com href="mailto:avery1@houston.rr.com">Avery</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=pianotech@ptg.org
href="mailto:pianotech@ptg.org">Pianotech List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, March 20, 2006 8:53
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: MY ETD IS MADE BY
SIEMENS</DIV>
<DIV><BR></DIV>Alan,<BR><BR>A0 & A1 are an octave apart. :-) <BR><BR>Avery
<BR><BR>At 02:39 PM 3/20/2006, you wrote:<BR>
<BLOCKQUOTE class=cite cite="" type="cite"><FONT face="Arial, Helvetica"
size=1><I>....................."I seem to remember reading somewhere that it
was around 30 hz. Very iffy.<BR><BR> /Is the point
which beat rate is too fast to <BR> be unusable for
us aural tuners any higher than 12 bps? Maybe that's
<BR> another measurement for an
ETD./<BR><BR></I></FONT><FONT face="Arial, Helvetica"
color=#ff0000><B><U>Definitely </U></B></FONT><FONT face="Arial, Helvetica"
size=1><I>(Ric) not. You can use 15 - 20 bps no problem. That is
to say if <BR>you are comparing two intervals in which the reference
note</I> </FONT><FONT face="Arial, Helvetica" color=#ff0000
size=2><B><U>yields <BR></U></B></FONT><FONT face="Arial, Helvetica"
size=1><I>roughly 20 bps for both intervals... an aural comparison is easy
enough <BR>to accomplish.".............<BR></I></FONT> <BR><FONT
face="Arial, Helvetica" size=2><B>This is the reason why AO (or A1) is the
first note or lowest note on the piano. Any frequency (read as beat rate)
lower than 27.5 Hz is no longer perceived as a sound by the "human" brain.
In theory we start to hear the separate beats or
pulses.<BR></B></FONT> <BR><FONT face="Arial, Helvetica"
size=2><B>AF<BR></FONT></B></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>