You might be looking for something like jackaudio or maybe pulseaudio. I know that Jack lets you connect things any way you want. Not sure about pulse. http://jackaudio.org/ The extra jack on your computer is probably a line in, for external sources, such as your stereo. You should be able to record input from that in Audacity without doing anything special. Recording digital input is another story, and I don't know that story. Greg Tatsh wrote:
Stupid Intel decided to build-in DRM into the spec of these things. I have a Conexant which has Nvidia codec to provide audio for the HDMI output (this works fine except that in alsa settings I have to force a default output device, 3).
What I'd like to do is be able to record from the stereo mixer, which I have none in alsamixer. So how do I go about creating one? I've tried a few different configs I found on-line but nothing seemed to work for me.
WIth this capability of course I could record audio from my computer in say, Audacity, or I could even broadcast audio through Skype. And the best part would be if I could broadcast audio through Skype AND use my headset at the same time (mixing the 2 into one channel input). I have 3 mic inputs apparently (one of them is webcam, another is the jack, and I don't know what the 3rd one is).
Image of KMix: http://bitpic.net/image/kmix-nvidia-hd-audio-codec
So far I know it's something I can do with ALSA settings where I can tell ALSA to redirect audio and 'copy' whatever is going on on any input channel (overriding the jack of course). No luck there yet.
Any help appreciated Thanks