[Linphone-users] Noise and artefacts in sound

[Matthias Peter Walther]

Hello,

I'm using linphone 3.9.1 on Ubuntu 14.04 from this repository:
https://launchpad.net/~felix.lechner/+archive/ubuntu/linphone-ppa.

Unfortunately, I have noise and sound artefacts, when I call with
linphone. They appear already directly when I start a call and the other
side hasn't picked up yet. I mean not even the locally generated beep,
which informs you about the call, is clear.

What can I do to debug this problem?

The problem occurs when I call via my local FritzBox (home router quite
common here in Germany, allows local sip phones) just like it appears
when I make a direct sip call to a testserver, for example to
sip:address@hidden

I tried to change the codecs, but it seems to happen with any of them. I
think it might be a problem between linphone and pulseaudio as Skype has
had similiar problems some years ago.

Thanks for reading
Matthias