[Freeswitch-dev] Ecasound support in FreeSWITCH?

Steve Underwood steveu at coppice.org
Fri Feb 13 09:38:40 PST 2009

Kristian Kielhofner wrote:
> Steve,
>   At the moment it is very elementary and probably easily reproduced.
> It's also the first check I could come up with and it was good enough
> to help me identify my issues.  As this tool/concept gets exposed to
> the real world and used in different applications, scenarios, etc it
> would be /very/ convenient to have the full power of ecasound and the
> LADSPA plugin architecture available at our disposal from FS.
>    There are plenty of people out there (hint, hint) that know far
> more about audio processing, etc than I do.  I'm sure they could come
> up with some very, very cool applications once FS audio can be put
> through ecasound/LADSPA (think mod_soundtouch on steroids).  I don't
> want my lack of understanding and foresight to get in their way.
>   Ecasound looks like the right tool for job and I'd hate to let
> something small like "licensing" get in the way ;)  I've already
> e-mailed the creator for an LGPL exception but the message bounced.
> I'm looking for other addresses and contacts.
>   Hmmm...  Maybe we could skip ecasound and just implement a LADSPA
> host in FS (LADSPA is LGPL).  My only concern here is the ability to
> write LADSPA plugins.  The barrier to entry and learning curve is
> certainly higher than some basic ecasound params.
Well, I had a look through ecasound, and it looks pretty useful for 
someone doing recording. It looks pretty useless for call analysis, though.

As for mod_soundtouch, the current version is largely a toy, as it takes 
too much compute time for serious application. There will probably be a 
more telephony oriented version of the same concept available in the not 
too distant future.


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