[Freeswitch-dev] why does app "record_session" record extra frequency range

[Han Xin]

Hi Anthony,

Problem is solved, I reverse the order of record_session and the low pass filtering module in the dial plan. Then it turns out to be working as expected. I am wondering how the order of media bugs are added and processed now. :P
 
----------------ursprüngliche Nachricht-----------------
Von: "Anthony Minessale" anthony.minessale at gmail.com 
An: freeswitch-dev at lists.freeswitch.org 
Datum: Tue, 22 Nov 2011 09:54:41 -0600
-------------------------------------------------
 
 
> Do you have an example of how you're doing it?
> 
> On Tue, Nov 22, 2011 at 8:31 AM, Han Xin xin at ind.rwth-aachen.de wrote:
> 
>> Hi all,
>>
>> I have a bridged call and a home brew module which adds a media bug to the
>> local and partner session before the bridge app in the dial plan. The
>> original speech codec used is G722, which sampling rate is 16KHz. I add a
>> media bug which does low pass filtering the speech to 4KHz. But the
>> spectrum of the recorded .wav file showed that it always contains the freq
>> range from 0K to 8K. The desired spectrum should contain only 0 to 4KHz.
>>
>> I am confused, can anyone show me some hints? Thanks in advance.
>>
>> Best Regards,
>>
>> Han
>> --
>>
>>
>>
>>
>> 
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> 
> 
> 
> -- 
> Anthony Minessale II
> 
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__________________________________________________
> 
> ____________________________________________________________________
> _____
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> 
> 
> 
> 
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