MY ETD IS MADE BY SIEMENS

[Avery]

Alan,

A0 & A1 are an octave apart. :-)

Avery

At 02:39 PM 3/20/2006, you wrote:
>....................."I seem to remember reading somewhere that it 
>was around 30 hz.  Very iffy.
>
>     /Is the point which beat rate is too fast to
>     be unusable for us aural tuners any higher than 12 bps? Maybe that's
>     another measurement for an ETD./
>
>Definitely  (Ric) not.  You can use 15 - 20 bps no problem.  That is 
>to say if
>you are comparing two intervals in which the reference note yields
>roughly 20 bps for both intervals... an aural comparison is easy enough
>to accomplish.".............
>
>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.
>
>AF
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