[Asterisk-Users] Choppy Audio in Echo Test and Music On Hold (1.2.0-b2)

[Sergey Okhapkin]

Do you have silence suppression enabled on your clients? Asterisk can't
work with silence suppression. Take a look at
http://bugs.digium.com/view.php?id=5374 , the patch works fine to me,
now I'm able to set SS and save bandwidth.

On Mon, 2005-11-07 at 19:41 -0800, Chris Tracy wrote:

>  	I recently resurrected an old athlon system and put CentOS 4.2 on 
> it to play with asterisk.  First I tried asterisk-1.0.9, now I'm using 
> 1.2.0-b2.  Both have the same audio issues that have me stumped.
> 
>  	I looked through all the lists and forums and the closest I could 
> get were some messages from 2003:
> 
> http://lists.digium.com/pipermail/asterisk-users/2003-August/017171.html
> 
>  	I've got asterisk set up with my xten-lite softphone on extension 
> 200 over SIP.  I've configured extension 611 as an echo test and 612 will 
> play 30 seconds of MusicOnHold.  I can connect to both just fine, however, 
> they sound rather bad when they work (quite muddy) and periodically they 
> just drop out for as much as 5 seconds before coming back.
> 
>  	Enabling all the debugging and verbosity options, I've found a few 
> messages that occur during each drop.  During the MOH run, every time 
> there's a drop, the console scrolls:
> 
> res_musiconhold.c:535 monmp3thread: Only wrote -1 of 640 bytes to pipe
> 
> over and over until the sound comes back, at which point, the console 
> message:
> 
> rtp.c:1247 ast_rtp_raw_write: Difference is 33824, ms is 4248
> 
> is displayed.  (Not always the same numbers in that one, obviously)
> 
>  	In the echo test, again, after a drop, the audio returns and a 
> message similar to:
> 
> rtp.c:1247 ast_rtp_raw_write: Difference is 12496, ms is 1582
> 
> is displayed.
> 
>  	The asterisk server is on a single Athlon MP 1600+ (1.4GHz) with 
> 512MB of RAM.  It's got a K7D-Master mobo, and is connected to the system 
> running the softphone through a 100Mbit LAN.
> 
>  	I've not enabled any of the MMX optimizations as there were 
> warnings that they didn't play nice with AMD chips.
> 
>  	If there's any further info I can provide, I'd be happy to.
> 
>  	Thanks,
> 
>  	Chris
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