By "improve" your kernel I just meant resolve the timer frequency issue or even better stop using xen altogether until you figure out why you have audio issues. <br><br>I assume you mean the voicemail messages sound good when you listen to them as an attachment in your email, and that your audio quality is always bad in real time from the server. Spitting an audio file into a codec bit by bit in real time requires decent precision to pull off ... recording each frame of audio you recieve into a file does not require precision timing. That is why the switch could sound poor and create perfect recordings ... although it is only a guess.<br>
<br>Are you testing with the phone and switch on the same LAN? Do you have physical access to the switch system and is it a regular old unvirtualized OS now? There seems to be either an issue with your FS system, or an issue with the network conditions between you and it. Sadly, I have not encountered enough RTP quality issues to be good at troubleshooting them or I might have great advice at this point. I just happen to be bored and feeling holiday helpful :)<br>
<br><br><div class="gmail_quote">On Sat, Dec 18, 2010 at 9:11 AM, Rafqat . <span dir="ltr"><<a href="mailto:rafonline@hotmail.com" target="_blank">rafonline@hotmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>
<br>I upgraded to dev snapshot (still on Xen) - still had audio issues.<br><br>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. <br>
<br>What I still dont understand is why when i playback my recorded voicemail messages the quality is good. <br><br>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.<div>
<br><br>Any help will be much appreciated.<br><br></div>Chris - can you please point me to some docs on how to improve my kernel (sorry but i am newbie to unix).<br><br>Cheers<br><br>Raf<br><br><br><hr>Date: Fri, 17 Dec 2010 18:05:09 -0500<br>
From: <a href="mailto:chris@cloudtel.com" target="_blank">chris@cloudtel.com</a><div><div></div><div><br>To: <a href="mailto:freeswitch-users@lists.freeswitch.org" target="_blank">freeswitch-users@lists.freeswitch.org</a><br>
Subject: Re: [Freeswitch-users] audio quality issue<br><br>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 :)<br>
<br>"-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)<br><br><div>
On Fri, Dec 17, 2010 at 4:30 PM, Rafqat . <span dir="ltr"><<a href="mailto:rafonline@hotmail.com" target="_blank">rafonline@hotmail.com</a>></span> wrote:<br><blockquote style="padding-left: 1ex;">
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<br>I will try the dev snapshot. <br><br>cheers<br><br>Raf<br><br>> Date: Fri, 17 Dec 2010 15:28:49 -0600<br>> From: <a href="mailto:anthony.minessale@gmail.com" target="_blank">anthony.minessale@gmail.com</a><div>
<br>> To: <a href="mailto:freeswitch-users@lists.freeswitch.org" target="_blank">freeswitch-users@lists.freeswitch.org</a><br></div>> Subject: Re: [Freeswitch-users] audio quality issue<div><div></div><div>
<br>> <br>> if you insist to remain on 1.0.6 try it with -vm -nocal cmd line options<br>> as i already stated you should try the development snapshot<br>> <br>> On Fri, Dec 17, 2010 at 3:22 PM, Rafqat . <<a href="mailto:rafonline@hotmail.com" target="_blank">rafonline@hotmail.com</a>> wrote:<br>
> ><br>> > btw. I have no audio issues when making calls between phones through<br>> > freeswitch (voice quality is very good).<br>> ><br>> ><br>> ><br>> > ________________________________<br>
> > From: <a href="mailto:rafonline@hotmail.com" target="_blank">rafonline@hotmail.com</a><br>> > To: <a href="mailto:freeswitch-users@lists.freeswitch.org" target="_blank">freeswitch-users@lists.freeswitch.org</a><br>
> > Date: Fri, 17 Dec 2010 21:19:11 +0000<br>> > Subject: [Freeswitch-users] audio quality issue<br>> ><br>> ><br>> ><br>> > Hi,<br>> ><br>> > I recently installed freeswitch 1.0.6 on centos 5.5 (hosted on xen server).<br>
> > I feel as if the audio quality is not as good as what it should be (6-7 out<br>> > of 10). This is apparent in calling the default voicemail IVR, sometimes I<br>> > have issues leaving a message, sometimes I hear some weird noises. However,<br>
> > I have no issues with the quality of the recorded voicemail message I leave,<br>> > it sounds fine on playback.<br>> ><br>> > Is this an issue with my phones (Flexor 500)? I have a softphone which<br>
> > doesn't seem as bad but still has issues.<br>> ><br>> > I also get the following message on startup of freeswitch:<br>> ><br>> > 2010-12-17 21:17:39.138958 [WARNING] switch_time.c:206 Timer resolution of<br>
> > 4000 microseconds detected!<br>> > Do you have your kernel timer frequency set to lower than 1,000Hz? You may<br>> > experience audio problems.<br>> ><br>> > I assume its related.<br>> ><br>
> > Any help will be much appreciated.<br>> ><br>> > Cheers<br>> ><br>> > Raf<br>> ><br>> > _______________________________________________ FreeSWITCH-users mailing<br>> > list <a href="mailto:FreeSWITCH-users@lists.freeswitch.org" target="_blank">FreeSWITCH-users@lists.freeswitch.org</a><br>
> > <a href="http://lists.freeswitch.org/mailman/listinfo/freeswitch-users" target="_blank">http://lists.freeswitch.org/mailman/listinfo/freeswitch-users</a><br>> > UNSUBSCRIBE:<a href="http://lists.freeswitch.org/mailman/options/freeswitch-users" target="_blank">http://lists.freeswitch.org/mailman/options/freeswitch-users</a><br>
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> > <a href="http://lists.freeswitch.org/mailman/listinfo/freeswitch-users" target="_blank">http://lists.freeswitch.org/mailman/listinfo/freeswitch-users</a><br>> > UNSUBSCRIBE:<a href="http://lists.freeswitch.org/mailman/options/freeswitch-users" target="_blank">http://lists.freeswitch.org/mailman/options/freeswitch-users</a><br>
> > <a href="http://www.freeswitch.org" target="_blank">http://www.freeswitch.org</a><br>> ><br>> ><br>> <br>> <br>> <br>> -- <br>> Anthony Minessale II<br>> <br>> FreeSWITCH <a href="http://www.freeswitch.org/" target="_blank">http://www.freeswitch.org/</a><br>
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