> I am not sure which settings must be changed to record with the internal > microphone. When i start aucat, I can't hear anything.
I've had the same trouble figuring out which set of settings control the selection of the internal and external microphone on my laptop. Wild guess it might be related to the way settings interact with each other, namely record, input select, ADC source, mix source etc. Probably these map 1:1 to the hardware features of the respective audio device but to me as a user that's a great riddle as well and no mixer program solved it for me yet (though I've not checked on that for a while).

