I posted a simple tip to an Identi.ca user (mxc) explaining how to record a skype conversation and felt that others might find the information useful. Here is an elaborated explanation of how to record the sound from a linux computer.
- Install pavucontrol and the gnome-sound-recorder (in the gnome-media package).
- Open the gnome-sound-recorder and start recording
- Open the pulseaudio volume control and switch to the recording tab
- Click on the down arrow of the "gnome-sound-recorder" Record Stream, Select "Move Stream" and move the stream to the "Monitor" stream for your sound card.
This should record all sound from your computer if you are using pulseaudio. I have not tested this with skype but it should work.