[Freeswitch-users] Better results from mod_vmd

[Abaci B]

I didn't try with stereo 44100Hz, I tried  simple g711 calls to Verizon
cell phones and it didn't trigger the beep, when calling a voicemail on
another freeswitch box it did detect the beep.


On Mon, Mar 21, 2016 at 9:27 AM, Piotr Gregor <piotrek.gregor at gmail.com>
wrote:

> Hi Abaci,
>
> back to your problems with Verizon voicemail - the cause of them is:
>
> 1. Audio is stereo
> 2. Audio is sampled at 44100Hz
> 3. DESA algorithm used in avmd is very sensitive to noise
>
> If you resample audio to 8000Hz and set avmd module to 8000Hz bit rate
> or leave it at 44100Hz but adjust avmd to 44100Hz while always properly
> handling number of channels (mono/stereo/...) then results are good.
> Avmd module in current form is unable to meet these requirements,
> but I am going to add the support for this.
>
> cheers,
> Piotr
>
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