microphone doesn't work in linux skype

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http://forums.fedoraforum.org – I run Gnome F17-32 installed from a Live CD and have a separate camera/mike. I just installed skype and the mike fails the skype online echo/sound test. It does work in my winxp skype. In System Settings-Sound-Input the Connector is Analog Line-In and the device is Internal Audio Analog Stereo. In Hardware the device is Internal Audio-1 Output/1 Input-Analog Stereo Duplex and the profile is Analog Stereo Duplex. In looking around in the forum I find references to pulseaudio; is this something necessary in my situation? :confused: I am just lifting off the start of the lea (HowTos)