another audio question, was: Re: adding silence to audio files, notx Debian Questions

Janina Sajka janina at
Fri Aug 8 16:21:46 EDT 2008

If your file is stereo and the device being demonstrated isn't panned
exactly the same as the voice, you might have success using the karaoke
feature in ecasound. I've had some good success with it, in any case, so
recommend giving it a try.


Gregory Nowak writes:
> Hash: SHA1
> Hi Chuck and all.
> Since we're on the topic of processing audio, I have a question of my
> own. Let's say, for example, that I have a file of someone
> demonstrating something, and this person talking is in the foreground,
> and slightly in the background is the sound of the device being
> demonstrated. What I was wondering is if it is possible to muffle the
> speech in the foreground, or get rid of it altogether, and bring the
> background sound into the foreground, making it the dominant sound, or
> making it the only sound being heard? 
> I imagine what I want to do could be done, in whole, or in part, by
> applying frequency filters. However, I'm also not a sound geek, so
> don't know how I'd figure out the frequencies I need to filter, though
> from reading the sox man page, I think I do understand how to apply
> the high-pass/low-pass filters once I know what frequency ranges to
> filter out, and which filter to apply, high or low. Thanks.
> Greg
> - -- 
> web site:
> gpg public key:
> skype: gregn1
> (authorization required, add me to your contacts list first)
> - --
> Free domains: or mail dns-manager at
> Version: GnuPG v1.4.9 (GNU/Linux)
> iEYEARECAAYFAkibZtEACgkQ7s9z/XlyUyD7aACgqwwa8spB61wHeUclWAo8rHsG
> gSwAnRAGN1woKbh/eExgH4M3TvMvqjq3
> =4zLp
> _______________________________________________
> Speakup mailing list
> Speakup at


Janina Sajka,	Phone:	+1.202.595.7777;	sip:janina at
Partner, Capital Accessibility LLC	http://CapitalAccessibility.Com

Marketing the Owasys 22C talking screenless cell phone in the U.S. and Canada
Learn more at http://ScreenlessPhone.Com

Chair, Open Accessibility	janina at	
Linux Foundation

More information about the Speakup mailing list