[Freeswitch-users] audio quality issue

[Rafqat .]

I upgraded to dev snapshot (still on Xen) - still had audio issues.

I got rid of xen server and installed centos 5.5 and freeswitch only - timer frequency warning disappeared - still felt audio was not what it should be.  

What I still dont understand is why when i playback my recorded voicemail messages the quality is good.  

Sometimes I even have issues leaving a message after the voicemail tone, the IVR seems to think i have ended recording the message before even starting.  The voicemail tone itself can be very high pitch at times.

Any help will be much appreciated.

Chris - can you please point me to some docs on how to improve my kernel (sorry but i am newbie to unix).

Cheers

Raf


Date: Fri, 17 Dec 2010 18:05:09 -0500
From: chris at cloudtel.com
To: freeswitch-users at lists.freeswitch.org
Subject: Re: [Freeswitch-users] audio quality issue

Improve the kernel and in your situation you will most likely improve your audio. You can't expect perfect audio when the thread handling RTP is waking up later than its designated time (after sleeping for the codec timing). The switch tests for the possibility of this issue on startup when it calibrates your clock offset ... thus it warned you :)


"-nocal" will simply skip the process of recognizing and warning that your kernel timer is slow, but will not alter performance in your situation (unless I am missing something)


On Fri, Dec 17, 2010 at 4:30 PM, Rafqat . <rafonline at hotmail.com> wrote:








I will try the dev snapshot. 

cheers

Raf

> Date: Fri, 17 Dec 2010 15:28:49 -0600
> From: anthony.minessale at gmail.com


> To: freeswitch-users at lists.freeswitch.org
> Subject: Re: [Freeswitch-users] audio quality issue

> 
> if you insist to remain on 1.0.6 try it with -vm -nocal cmd line options
> as i already stated you should try the development snapshot
> 
> On Fri, Dec 17, 2010 at 3:22 PM, Rafqat . <rafonline at hotmail.com> wrote:


> >
> > btw.  I have no audio issues when making calls between phones through
> > freeswitch (voice quality is very good).
> >
> >
> >
> > ________________________________


> > From: rafonline at hotmail.com
> > To: freeswitch-users at lists.freeswitch.org


> > Date: Fri, 17 Dec 2010 21:19:11 +0000
> > Subject: [Freeswitch-users] audio quality issue
> >
> >
> >
> > Hi,
> >
> > I recently installed freeswitch 1.0.6 on centos 5.5 (hosted on xen server).


> > I feel as if the audio quality is not as good as what it should be (6-7 out
> > of 10).  This is apparent in calling the default voicemail IVR, sometimes I
> > have issues leaving a message, sometimes I hear some weird noises.  However,


> > I have no issues with the quality of the recorded voicemail message I leave,
> > it sounds fine on playback.
> >
> > Is this an issue with my phones (Flexor 500)?  I have a softphone which


> > doesn't seem as bad but still has issues.
> >
> > I also get the following message on startup of freeswitch:
> >
> > 2010-12-17 21:17:39.138958 [WARNING] switch_time.c:206 Timer resolution of


> > 4000 microseconds detected!
> > Do you have your kernel timer frequency set to lower than 1,000Hz? You may
> > experience audio problems.
> >
> > I assume its related.
> >


> > Any help will be much appreciated.
> >
> > Cheers
> >
> > Raf
> >
> > _______________________________________________ FreeSWITCH-users mailing
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> 
> 
> 
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