Art Alexion on 26 Jan 2006 18:09:36 -0000

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Re: [PLUG] HTTP file command line download

Doug Crompton wrote:

>Ok... thanks for your help that worked fine....
>wget, mpg321, sox infile -b -r 8000 outfile
>The final result was a 8k rate 8 bit file. It is voice only. This is to be
>sent over a radio communications channel and the quality is fine except
>for one thing. Either in the original encoding or rate change, or both,
>the background or silence noise is to high to do what I want to do.
>The recording purposely has a no speaking period but the noise floor is to
>high for my broadcast equipment to recognize it. I need to filter, remove
>all sound below a certain level. I do not think low/high pass will work
>but rather sensing a period of silence below a certain level and inserting
>pure silence. Sox has a noise filtering mode but it requires knowing where
>there is already silence and then doing a second pass. Since I want to do
>this from the command line unattended I don't think this would work. Any
I'm not sure how much of this has to be accomplished from the command
line, or if it is once and done cleanup of the file.

If it is once and done, and you have gtk, I suggest Gnome Wave Cleaner
(gwc) which is specifically designed to do what you want.


Art Alexion
Arthur S. Alexion LLC

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