50kHz pitch shifter

[WeAreAs1 at aol.com]

In a message dated 6/12/00 11:43:10 PM, you wrote:

<<I've heard of people recording sub sonic phenomena (water level of a lake)
and play that back with higher speed. This is no problem, but some kind
of DC sampling device is needed (most audio ADC are sigma-delta and have
a zero at DC...)>>

It is possible to modify an Alesis ADAT so that it will record and play back 
DC.  I have heard about people doing this to record and play back DC control 
information for light shows and laser displays.  Although I haven't ever seen 
an ADAT schematic, I imagine that it's just a matter of removing some 
coupling caps and maybe adding some input offset trimmers.

<<And I've heard about people recording bats.>>

How about whale songs?

Michael Bacich