[Asterisk-Users] Asterisk Crackly Bad quality

[Bruno Hertz]

On Fri, 2004-12-17 at 12:01 -0700, Nihal wrote:
> I've freshly installed Asterisk on a Fedora C2 machine. Dual P4's, 2GB RAM. 15KRPM Drive.
> Using the default configs and added one Soft Sip phone.
> 
> While listening to the demo the quality isnt very good. It's kind of crackly and skips a bit.
> Should the sound be better or is that just what you get using IP phones/Asterisk?
> 
> (I ran the X-Lite phone).

Hi Nihal

don't know about FC2, but I can confirm that sound quality depends on
the distribution/kernel used, where I didn't figure out yet why.

I myself have FC3 and Debian Sarge with 2.6.8 kernel on the same
machine, and under both OS I compiled and installed an identical
asterix cvs version.

While the FC3 installation works alright regarding sound, I see
the same problems you described on Debian. I.e. the demo voice is
crackling and has delays (short moments of silence). A tcpdump showed
me that during those 'skips' actually no packets are transferred
from the asterix server to the client machine. So somewhere on the
server that voice data is buffered resp. delayed, god knows why.

As said, the same asterisk version works alright with FC3 on the same
machine.

I even logged and compared the make runs on both OS, but there are no
notable differences. Might be kernel, some external library, I have no
idea actually at this point.

Regards, Bruno.