asterisk users - Jul 2004 - Spectrum Analyizer software

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:
>  >
>>  >
>>  >   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
>  > > laptop (with sound and microphone) but I have been afraid to ask
what
>>
>[snip]

On Thu, Jul 15, 2004 at 07:41:14PM -0400, John Todd
wrote:
> 
> 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.
Doing spectrum analysis is not the major hurdle.

The major hurdles are:

   Extracting data from the bowels of zaptel.o

   Modifying the echo cancellation parameters in a running zaptel.o

See my previous post "Bounty!  For help with echo cancellation code".
I was serious about the "Name your price part".

echo@secondphone.com

> 
> 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:
> > >
> >> >
> >> >   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
> > > > laptop (with sound and microphone) but I have been afraid to
ask what
> >>
> >[snip]
> 
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