My setup is as follows:

FreeSWITCH -> SIP Trunk -> PSTN.

>From freeswitch, I'm making outbound calls using event socket via the
"external" profile. Except for the ext_rtp_ip and ext_sip_ip, everything is
default settings. Using "playback" application, I'm playing a mu-law audio.
I'm also starting the "vmd" application, so that I can replay the message on
beep.

Thanks for your suggestion on native format. I'll try it.

Thanks,
Vinuth.

On Wed, Dec 23, 2009 at 4:41 AM, Brian West <br...@freeswitch.org> wrote:

> If its degrading like that you have bigger issues... the sound files played
> from wav files vs raw PCM files is NO different on a land line and I speak
> from very many years of experience... your wav files are ulaw in wav
> containers thus will never play native which might just be part of your
> problem.  You would have to have raw headerless data in a .PCMU file for it
> to play native.
>
> Can you elaborate on your setup a bit more?
>
> /b
>
> On Dec 22, 2009, at 4:54 PM, Vinuth Madinur wrote:
>
> > The audio quality is a lot different when it plays on the landline. And
> the quality degrades a bit when the message played is lengthy >30s. So I
> thought it would be better if I have the file in mu-law and play it as is..
> >
> > Thanks,
> > Vinuth.
>
>
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