Thanks Vicki!
--
Kent Brede
http://sandhillsnaps.com/
http://aphotoaday.sandhillsnaps.org/
On Wed, May 4, 2011 at 5:13 PM, vickipowys <>wrote=
:
>
>
> Kent,
>
> First thing to do if you are going to try filtering is to save a copy
> of your original recording, and only play around with filtering on a
> COPY. For archiving, always save a copy of the ORIGINAL.
>
> I am on a Mac and my next step would be to check the recording in the
> live display window of apEQ from apulSoft - (now changed its name
> from apEQ to apQualizr, about $80 US and a 3.2 MB download.
> compatible with both Mac & Windows). If you have a hum in your
> recording you can see exactly where the drones occur and you can
> easily create your own series of notch filters. Or if there is
> aircraft or traffic drone or whatever you can create a wider filter
> from a range of filter types. You can see the effect the filter is
> having on the visual display, as well as hear it with your ears.
>
> Then after I have removed anything obvious in the way of hums or
> noise, if the audio clip still needs some help, I would then use
> Izotope RX which as Andrew has pointed out is a great program for
> broadband noise reduction, plus the spectral repair function can
> remove intermittent noise like the slam of a car door.
>
> HOWEVER, unfiltered recordings are always best!!! You do need to be
> very careful to avoid a 'filtered' sound in a recording, sometimes it
> is preferable to keep the noise of passing traffic, and avoid the
> dreaded artificial warbling sounds that you can get from broadband
> filtering. I would much rather hear an unfiltered recording than a
> poorly filtered one.
>
> cheers,
>
> Vicki
>
>
> On 05/05/2011, at 5:02 AM, ndbdxr wrote:
>
> > Thanks, Kent.
> >
> > Well, I checked all my small notebooks. As I said, it's not much -
> > But, it's all I was ever able to find (after MANY Web searches, etc.).
> > For Wildlife Sound recording enhancement, the recommendations I
> > read were to use the following filters. As for the others, I've
> > tried them, with mixed results. I've found that only 1 or 2 of
> > these filters can be applied. More than that, and you lose most of
> > your recording (you'll hardly hear anything). 80% of my recordings
> > are ultrasonic - Of bats & insects; so I don't use these
> > suggestions very much.
> > Perhaps someone else on this Group, will be able to add some
> > suggestions, etc., on the use of these Filters.
> > In chronological order (for the most part):
> >
> > 50Hz Comb Filter - Now, I've even tried to find an audio editing
> > program that offers a "Comb" Filter but, was unsuccessful, so...??
> >
> > 550Hz High Pass Filter -
> >
> > 2550Hz High Pass Filter -
> >
> > 150Hz High Pass Filter -
> >
> > 200Hz Low Pass Filter ?
> >
> > 300Hz Low Pass Filter -
> >
> > OK, I also just looked through my large notebook, and didn't find
> > anything else. So, that's it. Very sparse info!
> > But, again, I have a feeling that other Members here may be able to
> > help us! : )
> >
> > Cheers,
> > -Al
> >
> > --- In Kenton Brede <>
> > wrote:
> >>
> >> On Wed, May 4, 2011 at 2:39 AM, ndbdxr <> wrote:
> >>
> >>>
> >>>
> >>> Dear Andrew,
> >>>
> >>> This is very interesting - I look forward to looking into these
> >>> techniques.
> >>> Especially since I've gone through the exact same process as Dan,
> >>> the
> >>> original poster: Looking all over the place, basically.
> >>> I was only able to find very little info, re: good standard
> >>> practices, when
> >>> trying to clean up nature sound recordings.
> >>> In fact, I will check one of my notebooks, and transcribe what
> >>> little info
> >>> I was able to glean. I will also try to post my sources (I
> >>> believe I found
> >>> the info on a Wildlife Sound Recording Society site).
> >>> On my next post...
> >>>
> >> Al,
> >> I'm looking forward to seeing your notes, they would be much
> >> appreciated.
> >> :)
> >> Thanks,
> >>
> >> --
> >>
> >> Kent Brede
> >> http://sandhillsnaps.com/
> >> http://aphotoaday.sandhillsnaps.org/
> >>
> >>
>
>
--
Kent Brede
http://sandhillsnaps.com/
http://aphotoaday.sandhillsnaps.org/
|