Hi Peter,
I think the recording is already good enough, and the supporting spectrogra=
m makes it unmistakably clear. An attempt at "cleaning it up" would not be=
worth the effort because the frog sounds are at lower frequency than the o=
wl and do not actually interfere, and the insect sounds blend with the subj=
ect call in a way that would be very difficult to remedy without also damag=
ing the subject call. You might make some eq adjustments for aesthetic bala=
nce, but otherwise it sounds fine.
John Hartog
rockscallop.org
--- In Peter Shute <> wrote:
>
> Those of you who also subscribe to birding-aus will already heave seen To=
m Tarrant's request for help with identifying the bird chattering in the ba=
ckground of this recording:
> http://www.aviceda.org/audio/?p=3D208
>
> The problem is that the call is distant and masked by frog and insect cal=
ls. Can anyone suggest techniques for cleaning it up to make the call clear=
er?
>
> I tried high pass (>4000Hz) in Audacity, but it didn't clean it up enough=
. I repeated it a couple of times, and it was much cleaner, but sounded odd=
. I tried noise removal, which I'v never used before, using a quieter part =
of the track as a sample, and that sounded really odd.
>
> The call can be heard several times during the 1m20s recording, and a son=
ogram easily shows their location. Tom has provided a sample sonogram on th=
at page.
>
> Peter Shute
>
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