Analog AGC (was Re: [Iaxclient-devel] Re: Caller audio problem (daniel huhardeaux))

[Steve K. <st...@st...>]

Steve Kann wrote:

> Babar Shafiq wrote:
>
>> Hi List,
>>
>> I think I m facing the same sort of thing, I mean if I m calling I 
>> can hear good, I noticed
>> when the I put down the mic volume the other party can hear little 
>> better, it is silence threshold
>> ? or noice filter ?, also this problem is not coming with GSM, only 
>> with ilbc and speex.
>>  
>>
> Could be that you just have your mic set too hot, and it causes 
> clipping.  Perhaps GSM deals with mild clipping better than iLBC or 
> speex.
>
> I posted a patch a month ago or so that did analog (mixer-based) AGC;  
> I didn't get any feedback, but I might just add it to CVS.  I think 
> I'm going to use it in my builds..


I've just committed this code now;  It is enabled by default in the 
library, but if you set the filters yourself, to use it you must have 
IAXC_FILTER_AGC and IAXC_FILTER_AAGC set.

Feedback welcomed on this..

-SteveK