This was an interesting post from another list I'm on. I think that with all of the echo cancellation discussion happening, that someone perhaps might be on the lookout for this type of software, so this post was well-timed for Asterisk uses. It is perhaps the case that those of you working on volume/echo/etc stuff might find this useful towards your goals.
JT
To: [snip] From: [snip] Date: Thu, 15 Jul 2004 06:08:33 +0200 (CEST) Subject: Re: [snip] Noise masking to defeat listening devices
I didn't play with signal analysis yet. But I was looking around for some software and there are some interesting pieces around.
For Linux, there is often mentioned an excellent-looking one, Baudline <http://www.baudline.com/>. Not opensource but for no money.
For Windows, there is the $99 shareware Sigview <http://www.sigview.com/>.
A list of various digital signal processing programs is also here: <http://www.setileague.org/software/softlink.htm> but many links are dead.
An interesting program is also SkySweep <http://www.skysweep.com/index.html>.
Lots of software can be found here: <http://www.dxzone.com/catalog/Software/DSP/>
libDSP <http://libdsp.sourceforge.net/overview.html> is an open-source collection of various math functions for digital signal processing. A highly optimized library for Fourier transformation is FFTW, <http://www.fftw.org/>. These will be useful if you would like to grow your own DSP software.
And there's much more. But Baudline is what I heard about the most often.
On Wed, 14 Jul 2004, [snip] wrote:
Check the archives. There was a spirited discussion some time ago about PC software audio spectrum analysis. The program I use is no longer available (adobe took it off the market), but there are s number of excellent ones out there at low cost. Some of those provided by Amateur operators are excellent.
> Cheers, > [snip] > > [snip] wrote: >> > laptop (with sound and microphone) but I have been afraid to ask what> > I have also been testing a Windows application written by REI, the > �*�ASA-2000�*� audio spectrum analyzer. This seems to be a well written > application and it provides a lot of good information using a standard[snip]
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