<tt>I need a software recommendation. My goal is to automate a left-right
detection process for stereo recordings.</tt><br>
<br>
<pre style="margin: 0em;">Background:</pre><br>
<tt>I have a great many two-channel (stereo) recordings. They contain the
underwater sounds of a marine mammal captive environment and they were
recorded on a 24/7 basis over many months. Vocalizations coming from
one side (left) are quite common on these recordings. Vocalizations
from the right were rather rare, and we now have great interest in
screening our tapes in order to detect these rare, right-sided events.</tt><br>
<br>
<tt>I already have in place hardware and software for digitizing successive
six-hour epochs as WAV files and passing the large files via a local
network to a high-speed processor for analysis. However, I have not had
luck in finding a suitable software package for screening these files in
the way that I need.</tt><br>
<br>
<tt>Since these are stereo recordings from the same pool, any given
vocalization appears on both the left and right channels. So, it will
not be simply a matter of screening for events of a certain threshold on
a single channel. It seems that I need software that can continuously
compute a ratio between the left and right channel signal strengths and
this ratio needs to feed into a triggering system (along with an
ordinary intensity threshold feature) in writing out a time log of
detected events. Alternatively, a program that was very sensitive to
time-of-arrival differences between the two channels would presumably
also prove useful.</tt><br>
<br>
<tt>I would be grateful for any advice, and I will summarize responses for
the list.</tt><br>
<br>
<pre style="margin: 0em;">Thanks in advance.</pre><br>
<pre style="margin: 0em;">Mike Noonan</pre><br>
<pre style="margin: 0em;">--</pre><br>
<pre style="margin: 0em;">Michael Noonan, PhD
Professor, Biology and Psychology
Canisius College
Buffalo, New York 14208
t: 716-888-2518
e: [EMAIL PROTECTED]
w: www.canisius.edu/~noonan/
w: www.conservenature.org</pre><br>
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