Re: [HCDX]: sound processing results ?

[Bruce Portzer <bportzer@xxxxxxxx>]

Guido

I've been trying DSP software on some old DX recordings.  The two
programs I've tried are DARTpro32 (http://www.dartpro.com) and Pristine
Sounds (http://www.pristinesounds.com).  Both are loaded with audio
processing features and sell for about $100US.  You can download
shareware versions from their web sites, the evaluation versions limit
you to 30 seconds per recording but you can try most of the other
features.

Both programs are good at improving the subjective listening quality of
the recordings, in terms of reducing tape hiss, adjacent channel
interference, atmospheric noise, and possibly electrical noise. 
However, you have to experiment with the settings many times before you
get decent results (it's a lot easier to make a recording sound worse
than it is to make it sound better!)  Although the programs do make the
recordings sound "cleaner", I've found very little improvement in
readability.  Sometimes there's a word or two I wasn't sure about that's
now distinct, but that's about it.  

Bruce 

Guido Schotmans wrote:
> 
> I have been trying some DSP and sound processing tools on a recording from
> Radio Vanuatu I made in early December.  It was a very noisy recording from
> which I could understand nothing.  I've ID'ed them only from the 'yellow
> bird call'.  I thought that it would be possible to do some sound processing
> on it to make it more or less understandable. But the only result was that I
> could make it sound in many different ways, but not in such a way that it
> became better understandable.  Has anybody ever managed to clear up a
> DX-catch by sound processing ?
> 
> I tried the following stuff.
> 
> Software:  Chroma Sound
> http://www.siliconpixels.com
> 
> Swezey DSP
> http://www.winternet.com/~swezeyt/dsp.htm
> 
> and
> 
> CoolEdit
> http://www.syntrillium.com/cep/prodemo.htm.
> 
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> Guido Schotmans - Editor-in-Chief - DX-Antwerp, BELGIUM
> e-mail : gs@xxxxxx
> Narrow FM Homepage http://gallery.uunet.be/gs/
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