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Re: How would you clean up this file?

Subject: Re: How would you clean up this file?
From: "Anton Woldhek" getvergetver2
Date: Mon Jun 26, 2006 12:26 am (PDT)
Hi Rob,
As an experiment, try: http://ad2004.hku.nl
Username: game
Password: sound

If it works out ill see if I can squeeze some more milage out of my tuition
fees :)

Cheerio
Anton Woldhek


> -----Oorspronkelijk bericht-----
> Van: 
>  Namens Rob Danielson
> Verzonden: Monday, June 26, 2006 7:31 AM
> Aan: 
> Onderwerp: Re: [Nature Recordists] How would you clean up this file?
>
> Hi Gerry & Ed--
>
> I also was able to get normal playback (without the waivering
> lower mid tone that seems to stem from the bees?) by working
> from Dana's original .wav file.
>
> It could be that the cause was double M-S encoding as Dana
> speculated. I've also heard digital noise reduction plugs
> like Sound Soap create a similar effect. In any case, I'm
> doubtful that the waivering/companded effect was the result
> entirely of the mp3 encoding, which, I believe was at 128 kbs.
>
> I'm okay with people using 192-320 kbs MP3's-- even better if
> there's a uncompressed.wav or .aif download option too.
>
> It would be an asset if we had a couple of GB's of host space
> to upload snippets to-- especially because people use our
> archives and a great majority of our links die. I hesitate to
> upload meaningless fragments to Prelinger and similar
> archives. We might be able to make 2 GB last a long time with
> a policy of deleting files over 4mb? every 12 months. We
> could also selectively retain >4mb files that get sustained
> use. Rob D.
>
>   =3D =3D =3D =3D
>
> At 4:19 AM +0000 6/26/06, 1GDW wrote:
> >I have encoded the DawnChorusMS.wav using Lame and I believe this
> >MP3 is much better than the MP3 link.  I would post it to the file
> >section for comparison but the files in there are taking 97% 0f the
> >space.
> >
> >Gerald White Muscatine, IA
> >
> >--- In  Ed Anson <>
> >wrote:
> >>
> >>  Dana,
> >>
> >>  The WAV file sounds much better than the mp3. It's a pretty good
> >> recording. This reminds me of why I almost never use mp3 encoding.
> >>
> >>  I still don't hear much of the hiss you are worried about. But my
> >son
> >>  does. I think that's due to the relative ages of our ears. I took
> >a
> >>  quick look with a spectral analyzer and found an unusual
> amount of
> >> energy above 15 kHz. Combining that information with the one
> >annoying
> >>  sound I heard (the constant drone of insects) makes me think that
> >there
> >>  were a lot of insects in the area and they are making a lot of
> >high
> >>  frequency noise. That makes me think that gentle use of a
> low pass
> >> filter might improve things a bit.
> >>
> >>  Now I can also hear the rumble. Although it's not as annoying (to
> >me)
> >>  as the drone of the insects, a high pass filter does reduce it a
> >bit
> >>  and seems to clarify the rest of the sounds.
> >>
> >>  Unfortunately, I don't know of anything that will remove the
> >constant
> >>  insect noise without harming other sounds. So let's just be
> >purists and
> >>  say that it's a part of what was there in Nature. OTOH I
> would be
> >> inclined to edit out the motorcycle noise at the end.
> >>
> >>  Ed
> >>
> >>
> >>
> >>
> >>  On Jun 25, 2006, at 6:19 AM, Dana Blackmer wrote:
> >>
> >>  > Rob,
> >>  >
> >>  > Here are two links - the first is to an uncompressed portion of
> >the
> >>  > file
> >>  > before MS to XY decoding (it's a 70 second wav file, so will
> >take a
> >>  > little
> >>  > while to load).  The second is the same file with MS decoding
> >and
> >>  > converted
> >>  > to mp3.  I've included the mp3 version here because after I
> >tried to
> >>  > retrace my steps from my original post, I think that there is a
> >50/50
> >>  > chance that I mistakenly used an already decoded version of the
> >file
> >>  > and
> >>  > decoded it a second time before saving it as an mp3.
> >>  >
> >>  > Thanks for the help.
> >>  >
> >>  > Dana
> >>  >
> >>  > http://www.danablackmer.com/AudioFiles/DawnChorusMS.wav
> >>  >
> >>  > http://www.danablackmer.com/AudioFiles/DawnChorusXY.mp3
> >>  >
> >>  >
> >>  >
> >>  >
> >>  > At 09:00 PM 6/24/2006 -0500, you wrote:
> >>  >
> >>  >> At 2:23 PM +0000 6/24/06, Dana Blackmer wrote:
> >>  >>> Can this sound be filtered out or diminished without  >>>
> >> getting the "blurby" sounds I sometimes get with a filter?
> >>  >>
> >>  >> Hi Dana--
> >>  >> It seems like you should have a good recording there, but there
> >is
> >>  >> something peculiar going on isn't there? Any chance you can
> >post a
> >>  >> portion of the file uncompressed-- a straight copy of the field
> >  > >> original, no m-s decoding? Best, Rob D.
> >
> >
>
>
>
>
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