Ian Agranat of Wildlife Acoustics has created a device for autonomous
recording on a very flexible schedule. It's called the Song Meter.
Read about it here.
http://www.wildlifeacoustics.com/songmeter/
The Song Meter is a control module and digital recorder in the same
unit. With a suitable infusion of cash, I think the Song Meter could
be modified to control the Sound Devices recorder.
Recording at specified times would be very useful. William Rainey has
shown me that recording in response to the presence of a particular
sound would also be useful. This latter approach has to be more
sophisticated than a simple voice activation because it's important to
time stamp the recordings made when the target sound occurs.
The result would be a recording system that would monitor for a
particular sound, for example, whale song or wolf howls. Digitized
sound would pass through a pre-roll buffer. When the target sound is
detected, the recorder would be instructed to start up, capturing the
contents of the buffer, and would continue to record until the target
sound was no longer detected. The resulting data stream would be saved
as a file with a time stamp.
This process of separating the presence of desired sounds from general
sounds can also be conducted ex post facto using Wildlife Acoustics'
Song Scope software. Read about it here:
http://www.wildlifeacoustics.com/songscope/
--oryoki
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