50kHz pitch shifter

[Barry L Klein]

Wow, check out the bat detector section. Over $1000 for the fancy ones.  I
didn't know people were so into bats that they built "bat houses" for
them....   Wonder how many of those detectors they sell a year..  

Anyone on the list done any work converting visual attributes to stereo
sound representations?  I have always been intrigued with doing this and I
think a few of us talked about it before.  Anyone done it yet?

Anyone built the 73 Magazine CW binaural receiver?  I'd like to hear a mp3
file of the output.

Barry

----------
From: 	Curtin, Steven D (Steven)[SMTP:sdcurtin at lucent.com]
Sent: 	Tuesday, June 13, 2000 7:30 AM
To: 	tpaddock at seanet.com; 'Martin Czech'
Cc: 	synth-diy at node12b53.a2000.nl
Subject: 	RE: 50kHz pitch shifter

I heard a report on NPR where they were closing a former mine in Colorado
that was now a home for bats.  They had devices for detecting the bats
that
pitch-shifted the bat's "radar" signal into one we could hear.  Here's
some
info I found on this device after a quick search.  This would be
interesting
for hearing other sounds out of the range of human hearing possibly.   My
guess is it uses heterdyning circuitry like the Theremin does to transpose
the pitches into our hearing range.

http://www.batcon.org/seedark.html#one