Hey Chris,
I thought of somehow using the noise capture/footprint function to detect
similar sounds and gave that a go in Soundbooth. However, it is aimed at low
end white noise kind of sounds so didn't pick up the call of a barking owl that
I marked as 'noise'. The function still tried to remove the ambient noise (wind
in trees, sound of creek) rather than the owl call. After this unsuccessful
attempt I thought - surely there must be a software out there that can do what
you want (highlight a sound and then search for similar instances). So I typed
'sound editing find similar sounds how to' into Google and this is one of the
search results:
http://www.comparisonics.com/CSeditor.html
It seems to be able to find similar sounds in a recording, however, I am on a
Mac so cannot test it. If you have a Windows machine, maybe give it a try.
One last point on the Spectrograms. You'll likely find that once you know what
the spectrogram of the owl call looks like (i.e. you need to identify one
instance) your eyes will be able to easily pick up the pattern in the
spectrogram.
I'd be interested to hear how you're going and what works and what doesn't
after a few sessions, so maybe let us know :)
Cheers,
Eric
On 10/04/2013, at 5:11 AM, chrishails50 <> wrote:
> Dear all,
>
> Thanks to Gianni, Anders, John, Caspar, Eric and Peter (sorry if I missed
> anyone) for your responses. ALL very much appreciated.
>
> So there is no missing out the grunt work it seems (am I surprised ?). But
> amongst all your ideas I found most appealing:
>
> 1) using spectral view (duh - should've thought of that)
> 2) speeding up things (4x) using eyes and ears together
> 3) sampling
>
> For my owls I would try 1) and 2). I think sampling is probably fine for day
> time regular noises, but for an irregular night-time noise like an owl it may
> be easy to miss between samples.
>
> Several of you use a page skip function which is a great idea - I need to
> find that on Audition.
>
> Many thanks all, your time and experience much appreciated.
>
> C
>
> --- In "klangstrand" <>
> wrote:
> >
> > I suggest reducing the fft window size. At least in Soundtrack Pro it
> > enables me to view a longer sample at a time, and gives a smoother
> > experience, since it takes away some of the strain on the processor.
> > As of my understanding, I believe the resolution is only critical on lower
> > frequencies. So a reduction in resolution and some tweaking of the
> > frequency- and amplitude display, should point out any anomaly pretty
> > quickly. I usually get 15 minutes worth of recordings on screen at a time,
> > where most activity is fairly protruding.
> > Lowering the resloution to, say 512, makes scrolling unproblematic.
> > I may not fully understand the science of it, but in my experience this
> > works pretty well.
> > Best
> > -A
> >
> >
> > --- In Peter Shute <pshute@> wrote:
> > >
> > > I can see that it would be useful for short listing sections to include
> > > in an edited version, but remember that the original request was for
> > > methods of finding owl calls in long recordings.
> > >
> > > Peter Shute
> > >
> > > Sent from my iPad
> > >
> > > On 08/04/2013, at 11:14 PM, "rapsac" <rapsac@<rapsac@>> wrote:
> > >
> > >
> > >
> > > Well, you don't get much of an impression from a single fragment, but
> > > you get a feeling for changes over time and if anything stands out you
> > > can just stop skipping. It's not a great method but it saves the time of
> > > trying to think of a smart solution ;)
> > >
> > > Caspar
> > >
> > > Peter Shute skrev 2013-04-08 12:46:
> > > > Caspar, are you listening to a short burst every few seconds though the
> > > > recording? What sort of impression can you get from a fraction of a
> > > > second?
> > > >
> > > > Peter Shute
> > > >
> > > > Sent from my iPad
> > > >
> > > > On 08/04/2013, at 6:28 PM, "rapsac"
> > > > <rapsac@<rapsac%40bredband.net><rapsac@<rapsac%40bredband.net>>>
> > > > wrote:
> > > >
> > > >
> > > >
> > > > Hi,
> > > >
> > > > I first divide the recording into shorter manageable files, then scan
> > > > them using Sound Forge by clicking through the waveform while playing
> > > > back. With some practice you only need to listen to a fraction of a
> > > > second for each "click".
> > > >
> > > > Caspar
> > > >
> > > > chrishails50 wrote 2013-04-07 18:20:
> > > >> 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 overnight. 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
> > > >> the past I have had them playing background whilst I do other tasks,
> > > >> but normally I can only spend maybe 2 hours doing that. I then moved
> > > >> on to scanning the waveform files (for night-time this works I think):
> > > >> I apply a 100% notch filter below 600Hz to get rid of passing planes
> > > >> and boy racers then scroll the waveform (I use Audition 3)and look for
> > > >> peaks that could be interesting 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 his parabola, but I have a day job too.....has anyone else faced
> > > >> this ?
> > > >>
> > > >> Thanks for any tips or ideas.
> > > >>
> > > >> Chris
> > > >> http://www.wildechoes.org
> > > >>
> > > >>
> > > >>
> > > >> ------------------------------------
> > > >>
> > > >> "While a picture is worth a thousand words, a
> > > >> sound is worth a thousand pictures." R. Murray Schafer via Bernie
> > > >> Krause.
> > > >>
> > > >> Yahoo! Groups Links
> > > >>
> > > >>
> > > >>
> > > >>
> > > >
> > > >
> > > >
> > > >
> > > > ------------------------------------
> > > >
> > > > "While a picture is worth a thousand words, a
> > > > sound is worth a thousand pictures." R. Murray Schafer via Bernie
> > > > Krause.
> > > >
> > > > Yahoo! Groups Links
> > > >
> > > >
> > > >
> > > >
> > >
> >
>
>
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