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

Anthony Minessale anthony.minessale at gmail.com
Tue Nov 22 18:54:41 MSK 2011

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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