[Freeswitch-users] VM sound very choppy

[Michael Collins]

No need to worry about "L16" codec - that's talking about signed linear 16
bit audio, i.e. uncompressed, raw audio. If you're talking directly to
FreeSWITCH, for example when you call voicemail or call an IVR, then the
FreeSWITCH side will definitely be "L16". However, if you are connecting
through to another device, like another telephone, then you'll see codec
negotiation.

Remember: when audio passes through FreeSWITCH it always gets decoded
(unless you're using proxy media, but don't do that) and re-encoded, so
you'll always see references to L16 which is the "decoded" audio. The
primary reason for decoding everything is that FreeSWITCH can then do fun
stuff like eavesdropping, mixing audio, conference calls, etc. You can't
(easily) mix encoded audio.

So... your issue is most likely not with a codec mismatch but rather timing
on the VM. I'll defer to those who know more about VMs and such.

-MC

On Thu, Mar 22, 2012 at 9:23 AM, Bzzz <lazyvirus at gmx.com> wrote:

> FS last git
> fusionpbx
> ===========
>
> Hi list,
>
> I'm testing FS w/ twinkle, put iLBC as first CODEC and don't follow
> far end CODEC preference.  All extensions have proxy_media set.
>
> When I call the VM (*97) I get a very choppy audio.
>
> FS log says: [DEBUG] switch_ivr_play_say.c:1306 Codec Activated L16 at 8000hz1 channels 30ms
> when twinkle says: ilbc
>
> I guess that the source of my problem, but how can I change that for
> FS to switch to iLBC? (I already modified CODECs names & orders into
> conf/vars.xml to set iLBX at 30i first, and twinkle is also set to 30ms)
>
> Jean-Yves
> --
> Question authority.
>
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