[Freeswitch-users] Audio rate changes and clipping on playback

[Brian West]

Dale,
	What SVN rev are you running?  Is this a xen or other virtual  
instance?  I have done extensive testing in this area and haven't seen  
this... It could be related to QoS bits.  Have you tried to use  
iptables to tag your traffic?  Check this link http://wiki.freeswitch.org/wiki/QoS/

FreeSWITCH doesn't tag any traffic with any QoS bits and Asterisk  
does... So you might have to use the above URL to cause the traffic to  
get tagged and prioritized on the ADSL router.

/b


On Jan 26, 2008, at 7:29 AM, freeswitch at dalethatcher.com wrote:

> Hello all!
>
> I'm experiencing some problems with clipping and the rate of  
> playback of
> wav files from Freeswitch.  I've not raised this before as I thought  
> the
> problems were due to hosting over an ADSL line.  However I've now seen
> the same issues running from a dedicated host.
>
> My test setup is:
>
> 	Client <-> NAT ADSL <-> Freeswitch
>
> I've replicated using both the Gizmo and FWD clients from Windows.   
> If I
> substitute Asterisk with Freeswitch then the audio comes over fine.   
> The
> two test samples are one of myself and the fpm-sunshine.wav that is
> bundled with asterisk.
>
> I've tried playing around with the codecs but see the same problems
> regardless.  Also I've performed a test with a conference hosted on  
> the
> Freeswitch instance with myself and friend dialling in using Gizmo and
> the audio is fine.  Which implied to me that the link between Gizmo to
> Freeswitch is ok.
>
> So I'm guessing that there is something wrong with the samples that is
> causing the problem?  They're both in this format:
>
> $ file fpm-sunshine.wav
> RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, mono  
> 8000 Hz
>
> My deployment platform is Debian stable and the Freeswitch SVN  
> revision
> is 7343.  I've tried looking in Jira but keep getting a system error
> page (for search terms 'audio', 'wav' and others).
>
> Is anyone else seeing the same issues or has a solution?
>
> thanks,
>
> - Dale
>
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