[asterisk-users] HPEC audio clipping

Stephen Bosch posting at vodacomm.ca
Fri Apr 6 10:34:33 MST 2007


Greg Siemon wrote:
> Same issue here as well.
> Running Centos 4.4 (x86_64) with all updates installed on a Pentium D
> 2.8 GHz, 1.5GB RAM and TDM800P with 1 x Quad FXS and 2 x FXO ports.
> I installed the new 64 bit HPEC module earlier in the week when it was
> released and have been unable to get it to work.  I have the same
> symptoms as the OP and also noticed that there is much more line noise
> (soft static) than when HPEC is disabled.
> I sent a support request in several days ago and I have not yet seen a
> reply.

I have observed very similar behaviour in an HPEC installation.

Some observations: the clipping happens if receive gain is cranked up.
If I set the gain to defaults, the clipping goes away, but then I have
the problem of users complaining that the remote caller is too quiet.

Another recommendation -- whether or not you are using Zaptel 1.2.x or
1.4.x, you should always the fxotune from 1.4.x.

A question - do the people who are experiencing this problem have
non-default gain settings, either in zapata.conf or in the telephone sets?


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