Hi!
My solution is spectral view. Most often I use Soundtrack Pro, or Audition.=
Audacity has it also, and is free.
The spectral view easily shows when something "different" happens, that wou=
ld otherwise be invisible in waveform, like high pitched things, that don=
=B4t carry alot of energy, respectively.
You can also trim the view of noisefloor so that you see low-energy things =
happening aswell, in addition to choose frequency range. Thing sticks out p=
retty fast.
After a while one gets a hunch of types of activity looking at the spectrum=
. Even pointing out different species. Every bird and animal has its distin=
ct drawings.
I get through hours of recordings pretty fast this way, if that=B4s what I =
need for the task at hand.
Best
-Anders
--- In "chrishails50" <> wrote=
:
>
> Dear all
>
> Related to my last question, I wonder if anyone has any great tricks for =
reviewing long duration recordings ?
>
> I have over the years amassed enough reasonable mics and machines to have=
at least two sets (and maybe a third) that can be left out unattended over=
night. I would like to survey my local woods and forests and catch some of =
the owls that are out there that I have not yet recorded.
>
> But my question is how to review an 8-10 hour session efficiently ? In t=
he past I have had them playing background whilst I do other tasks, but nor=
mally I can only spend maybe 2 hours doing that. I then moved on to scannin=
g the waveform files (for night-time this works I think): I apply a 100% no=
tch filter below 600Hz to get rid of passing planes and boy racers then scr=
oll the waveform (I use Audition 3)and look for peaks that could be interes=
ting sounds. But as I have just discovered even this takes a chunk of time =
if I have two machines running overnight.
>
> I know a real field guy would spend the night wandering the forest with h=
is parabola, but I have a day job too.....has anyone else faced this ?
>
> Thanks for any tips or ideas.
>
> Chris
> http://www.wildechoes.org
>
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