I just stumbled upon a very strange behaviour and I'm completely clueless at the moment.

Situation: I (or more correctly: my son) want to do screenrecordings of Minecraft, speak and record live comments on it and also record audio of other players in a multiplayer game that are connected via Skype.
Recording of screen and audio (game sound plus microphone) works very well, but as soon as a Skype connection is active, no audio is recorded at all, neither game sound nor microphone nor the Skype conversation (this part edited after doing some investigation ).

As long as Skype is just running in the background without an active connection, everything is fine.

System setup (every software fully updated):
- Xubuntu 12.04
- Minecraft 1.7.2
- glc
- 3 audio devices present according to aplay -l:
- 0: internal audio (AC97)
- 1: PCM 2900 USB (audio mixer as sound source, microphone is connected to it)
- 2: Nvidia HDMI audio
- System sound input is set to PCM 2900 master (also for Skype)
- System sound output is set to internal audio analog
- Minecraft is started with glc-capture -a 'hw:0,48000,2;hw:1,48000,2' java -jar /path/to/minecraft.jar

Any ideas appreciated

Few things to know about skype
What Richard Stallman can say about skype?
What is going on: Spy state shock: Gmail, Yahoo Mail, Facebook, Skype, AOL, Apple all secretly sharing private user communications with NSA

Sorry I can't help you with your problem but at least I can tell you something about that particular software.

Regards

Thanks for your reply, ukiuki.
I know the risks of Skype and have taken some precautions. Anyway, in this case I left that decision to my son after telling him about these risks.
An alternative would be Teamspeak, though I doubt the security situation is much better there.

Concerning the technical problem: it all seems to reduce to Skype catching or muting all audio recording. There appears to be no option in the GUI to change that behaviour.
So, still help is appreciated.