Need help with the restauration of an audio file

[kotyczka]

Hi,

I'm trying to restore an audio file, but without success.

There is some noise and some 'chirping' (how to describe
it correctly?). I put two short samples (about 2 MB each)
to http://home.arcor.de/kotyczka/download/Test1.wav and
to http://home.arcor.de/kotyczka/download/Test2.wav ,
so you can listen yourselves what I mean.

The noise is no problem for me, I can reduce it with
Agorithmix 'Easytools'. However the 'chirping' is really
annoying and I have no idea how to get rid of it.
I tried it with Goldwave (which is IMO not very good for
such things) and with CoolEdit Pro 2.1. In CoolEdit I
tried several things, but none of them were successful.
The best should be 'Noise reduction'. But I can only kill
noise and chirping simultaneously, and the result sounds
rather strange. These are the parameters I used in 'noise
reduction':
FFT size: 4096
Reduce by 40 db
Precision factor: 7
Smoothing amount: 1
Transition width: 0 db
Spectral decay rate: 65%
Noise reduction level: 100
furthermore frequency curve: flat (all 100%)

I have no idea at which frequency range the 'chirping'
'lives'.

Could anybody please listen to the short samples and (maybe)
give me some advice howto improve that sound? I'd be very
glad. It's one of 13 movies, and I really would like to have
this one in the same good sound quality as the others.

TIA

[setarip_old]

Hi!

I believe you can use (freeware) "Audacity" to first take a sample of the offending sound and then apply it to your entire audiostream as "something to be eliminated"...

[Pookie]

Find a quiet part without any dialogue and use a spectrum analyzer to determine the frequency of the chirping. Then use a De-Esser in that small frequency range to reduce the chirp. If you have a 48 band Graphic Eq, you might be able to reduce those spikes in the exact areas. You can see the spikes around 7-9Khz - probably the area you want to process.

http://www.freeimagehost.eu/thumbs/3836db3901.gif (http://www.freeimagehost.eu/image/3836db3901)
free image host (http://www.freeimagehost.eu)

[kotyczka]

Find a quiet part without any dialogue and use a spectrum analyzer to determine the frequency of the chirping. Then use a De-Esser in that small frequency range to reduce the chirp. If you have a 48 band Graphic Eq, you might be able to reduce those spikes in the exact areas. You can see the spikes around 7-9Khz - probably the area you want to process.

http://www.freeimagehost.eu/thumbs/3836db3901.gif (http://www.freeimagehost.eu/image/3836db3901)
free image host (http://www.freeimagehost.eu)

Thanks for taking a look at my file.

Since I'm not familiar with De-Esser I'd like to ask again.
In Goldwave I do not find a De-Esser at all, and in Cooledit 2.1
I cannot see how to restrict De-Esser to a special frequency band. Cooledit has a 30 band equalizer only. So I guess it's
not the right program for my purpose. Can you recommend
me some better software? (Freeware would be great, but I think it's not very likely) Or some full functional Shareware
(within the trial period).

[Pookie]

http://www.shareit.com/demoreg.html?productid=132347&languageid=1

The one above is a 21 day unrestricted trial - DirectX, so it will work with Goldwave

http://www.digitalfishphones.com/main.php?item=2&subItem=5

That one is free VST