OK, Thanks! That is pretty clear now. Indeed I forget to say that this warning was issued when using the Speex codec.
From: Lyubomir Marinov
Sent: Friday, September 14, 2012 4:08 PM
Subject: [jitsi-dev] Re: VAD Warning Message
On 14.09.2012, at 16:35, "Gilles Gerlinger (AvanSonic)" <firstname.lastname@example.org> wrote
warning: The VAD has been replaced by a hack pending a complete rewrite
Could someone tell me what VAD refers to and what this warning is about?
VAD stands for Voice Activity Detection and is a piece of functionality implemented by the Speex library. The message warns that� well, the functionality in question has not been stabilized by its developers. Jitsi uses the Speex library for the purposes of echo cancellation and noise reduction and, consequently, Speex gets a chance to print out the warning.