In this screencast, I show how to enable something like stereo mix on Ubuntu 12.04, in other words, how to record your microphone and your speakers at the same time. After having done this, it is straight-forward to record a Skype meeting, a Google+ Hangout or any VOIP conversation with both your voice and all other participants with something like the GTK Sound Recorder.
The short story:
* Get PulseAudio Volume Control (pavucontrol)
* On Input devices tab, see that you have “Monitor of…