Hello, my name is Rusty. Sorry for the delay. You have different microphone selections. The default is the line in, but since you have a mic on the webcam, you need to switch to the webcam mic, instead of the line in. Your friend's mic is set up correctly, that's why you can hear her. Click here to learn how to switch your microphone input on your Linux system. Be sure to have your camera plugged in when you make this setting.