Re: [Ekiga-list] Very choppy sound with sip:500 ekiga net

[Derek Smithies <derek indranet co nz>]

Hi,
 I wonder if you can make an audio only call to the sip:500 ekiga net
address.

find a second computer with a microphone attached, and record the sound 
that comes out the speaker.

If we can see a regular pattern in the sound, or such, it will be possible 
to work out the cause of your sound issues.

My suggestion is to put the sound you recorded into analysis software 
(audacity is a great start) and look for periods in the sound.
  My guess: There is a regular 30ms pattern in the sound. 20ms on, and 
             then 10ms off.

Weird things with alsa exist. - I have one particular alsa setup that 
demands the audio supplied to it is in 20ms chunks, which conflicts with 
those codecs that use 30ms chunks. It is a long story on that one, and 
results in time modifying /etc/asound.conf

Derek

 On Tue, 16 Jan 2007, George Boyd wrote:

> Are you using video when you make your calls? 50 KB/s upstream isn't
> quite enough if you are using video and have the quality or frame rate
> set very high.
> 
> I'm not sure if I asked you before, but you might try using GSM instead
> of ilbc if your VOIP provider uses it. Also if your VOIP provider uses
> SPEEX narrow, that will help a lot too.
> 
> I'm using cable (1 megabyte download, 356 kilobytes upload and on some
> connections using video, it's still not enough if I'm also using one of
> the audio codecs that are high bandwidth hogs plus high quality video.
> 
> Also, if you don't mind making your video smaller, that will cut down on
> a lot of your band width uses.
> 
> Also, if your talking to friends that are using standard analog modems,
> that can also create the problems you describe if they aren't using one
> of the low bandwidth audio codecs (or are trying to use video too with
> the video quality and frame rates set to high).
> 
> I hope this info will help you in resolving your problems with the
> audio.
> 
> If there is anything else I run across that may help you, I will let you
> know,
> 
> Good Luck,
> George
> 
> 
> 
> >    300 KB/s downstream, 50 KB/s upstream, where 1 KB = 1,024 bytes.
> > 
> >    GnomeMeeting 1.2.2 used to work fine on this connection, and so
> > does Skype (well, as fine as Skype can work).
> 
> 
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> 

-- 
Derek Smithies Ph.D.
IndraNet Technologies Ltd.
Email: derek indranet co nz
ph +64 3 365 6485
Web: http://www.indranet-technologies.com/