[asterisk-users] jittery audio in voiceprompts

[Jason Lewis]

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