If you wanted to implement something like this you could do so as a media bug, it does not need to touch mod_conference in any way.  Take a look at mod_ladspa for an example of a similar module that modifies audio using a media bug.  Give it a try and see if you can get something working.

Mike

On Jan 15, 2013, at 8:03 PM, Michael Collins <msc@freeswitch.org> wrote:

While I don't have a problem with the concept of noise filtering I have to point out that each member of the conference can have his or her own noise level setting. From fs_cli:

conference <conf name> energy <member_id|all|last|non_moderator> [<newval>]

You only need to apply it to the person who is in the noisy location. In fact, in the example configuration the user can dial 9 to increase the energy threshold (for when he's in a noisy environment) or press 7 to decrease the threshold. Pressing 8 will reset the energy to normal, which I believe is 200.

-MC

On Tue, Jan 15, 2013 at 4:24 PM, Usama Zaidi <itsusama@gmail.com> wrote:

Hi,

I talked about this a while back on the channel, the way how energy-level is implemented in mod_conference isn't the right way to handle noise in my opinion because the participants that get bridged would have a different noise floor depending on where they are located, so if I set the value of energy-level too high to accommodate one participant, any other participant in a quite sitting would never get bridged, I proposed we should tackle this the way Asterisk does using a denoise dialplan function (https://wiki.asterisk.org/wiki/display/AST/Asterisk+10+Function_DENOISE), we can use libav for noise filtering on the muxed audio. I'm willing to contribute if one of the devs would help me out regarding implementation. Any comments?

-Regards

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