At 12:41 PM +1000 10/1/09, Paul Jacobson wrote:
>Hi All,
>
>On the way back from the recent AWSRG workshop at Gundabooka, I made
>recording of the dawn calls of Spiny-cheeked Honeyeaters at Roundhill
>Nature Reserve in the New South Wales Mallee. These are really quite
>different to the normal daytime calls and quite haunting.
>Unfortunately the batteries on my recorder were close to flat and this
>seems to have resulted in significantly higher levels of hiss that I
>normally get from the AT3032's.
>
>I've tried doing some clean up with a demo copy of the Izotope RX
>Denoiser plugin which seems to work reasonably well, but with the loss
>of some detail. I'm sure with a real copy and some more fiddling I'd
>be able to get a better result! As an aside the spectral repair
>function in RX is phenomenally good at removing things like car door
>slams!!
>
><http://www.urbanbirder.com.au/outback-nsw/spiny-cheeked-honeyeaters-round-hill>http://www.urbanbirder.com.au/outback-nsw/spiny-cheeked-honeyeaters-round-hill
>
>I've also posted a small after and before comparison with a short
>section with noise reduction applied followed by the original with
>only gain applied.
>
><http://www.urbanbirder.com.au/outback-nsw/spiny-cheeked-honeyeater-nr-example>http://www.urbanbirder.com.au/outback-nsw/spiny-cheeked-honeyeater-nr-example
>
>There is also a short edit of a recording I made at Gundabooka
>National Park, in Northern NSW, during the AWSRG workshop posted at
>on <http://www.awsrg.org.au>http://www.awsrg.org.au
>
>cheers
>Paul
>
Hi Paul--
Amazing birds and recording. You obviously knew where to set-up your rig!
When fiddling with Izotope, I usually have a hard time judging how
much noise reduction to use. Its appealing to lose all the hiss but
the edge of the higher pitched sounds can become dulled and the space
can feel less airy. I took your original snippet and played with EQ
and made a comparison movie which may make what I'm trying to
describe somewhat audible:
QuickTime Movie 12mb uncompressed AIFF soundtrack
https://pantherfile.uwm.edu/type/public/temporary/IzoTopeNoiseReductionVsEq_Lrg.mov
QuickTime Movie 3mb compressed AAC soundtrack
https://pantherfile.uwm.edu/type/public/temporary/IzoTopeNoiseReductionVsEq_AAC.mov
There seems to be some stridency in some bandwidths during the louder
calls that were possibly produced by the mp3 compression step.
Addressing this with EQ would be either unnecessary or easier when
working with the original. Rob D.
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