[asterisk-users] jittery audio in voiceprompts

[Steve Murphy]

On Wed, 2007-02-28 at 10:12 +1100, Jason Lewis wrote:
> Hi,
> 
> I have been testing asterisk 1.4 with a view to deploying it in my
> organisation and I am experiencing jittery voice prompts from the voice
> mail system. I get this jitter even if I try a simple "hello world" dial
> plan.
> 
> I have tried the release of 1.4 and also 1.4 svn and both display this
> issue. I have also tried it on a dedicated linux box and on a linux
> install running under vmware and both exhibited this issue. Linux box is
> perhaps a little under powered, it is an Intel Celeron 467Mhz. I tested
> with asterisk niced to -18, which did not change the problem.
> 
> I am using a Linksys SPA942 sip phone, using ALAW. I have tried gsm and
> alaw prompts but that didn't solve it.
> 
> I am running Linux blue 2.6.16.20 on a debian stable machine. I have
> been compiling and installing asterisk from source.
> 
> I have tried looking at the debug messages in asterisk but nothing seems
> to indicate an issue.
> 
> I read somewhere that disabling X can help, but it did not in my case.
> 
> I am at a loss as to how I might track down the problem and fix it. Any
> pointers would be greatly appreciated.
> 
> Thanks,

Jason--

What do you have installed, that will provide the 1Khz timing interrupts
you will need to function properly?

murf


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