R: [Asterisk-Users] Sound Quality Problems

[Yousef Herzallah]

Try to use 2.6.10 kernel not 2.6.12.3 kernel
Coz I got some problems with the kernel 2.6.12, I had the same Digium Wildcard TE110P,
 
Good luck
 
________________________________

Da: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] Per conto di Robert Christian
Inviato: martedì 26 luglio 2005 19.13
A: asterisk-users at lists.digium.com
Oggetto: [Asterisk-Users] Sound Quality Problems
 
Thanks for reading this.  I've been pulling hair for days trying to resolve this, and any help someone can give me would be very much appreciated.
 
I have an Asterisk box that is basically a P4-3GHz, a Digium-recommended SuperMicro X5SSE-GM motherboard, 2GB RAM, 250GB IDE hard-drive with UDMA, a SoundBlaster Live! 24 sound card, a Digium Wildcard TE110P, and a Digium Wildcard TDM400P with 4 FXS modules.  Right now the Ethernet is hooked up directly to a single VoIP phone (Grandstream GXP-2000).  I'm running kernel 2.6.12.3.
 
THE PROBLEM:  The problem I am having is when using the speakers hooked into the SB Live! 24 card.  When I call through like an intercom (my intention) and have the dialplan play an announcement (for testing purposes, I have used both the included "you-sound-cute" and "lots-o-monkeys"), it's very choppy - to the point of being laughably unacceptable.  Then when I talk over the "intercom," my voice sounds just as choppy.  Interestingly enough, when I go to the console and dial the demo included in the Asterisk sample configuration files (which I left in for testing), the woman's voice sounds fine (for 8KHz anyway).  But the demo is an IVR menu, and when I dial "2" for more information (for example), it starts playing the next message - all choppy.
 
I have read hundreds of mailing list posts and dozens of how-tos and diagnostics suggestions online.  I've tweaked out motherboard settings, kernel options, hard drive parameters, etc. with no success.  I've tried literally dozens of ALSA configurations thinking that the problem could be there.  I've focused on kernel and IRQ optimizing, ALSA configuration, Asterisk configuration, and Zaptel configuration (in case it's a timing problem) with no success.  I have been completely unable to resolve this problem.  I have a PRI line on its way, but since "zttest" suggests the internal timing of the TE110P is accurate within Digium specs, I don't think external synchronization will help anything.
 
Maybe the SB Live! 24 isn't the best card to use for the console intercom on this system.  But supposedly ALSA has full support for it.
 
Any help at all is greatly appreciated.
Thank you.
 
- Robert
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