Hi, i've just finished building my G4 up, and im trying to record audio, and have conversations on skype, but even with a headset plugged into the microphone in plug on the back, the system isnt picking the sound up, i've made sure that the line in option is selected in system prefs, but when trying to calibrate it, it dont pick my voice up, the headset works fine on my other computer, but i'm not sure what else to try, could it be the sound on the mobo, or do i need a separate soundcard, im on a G4 Sawtooth with osx 10.4