Before you start, make sure that your headset is (or speakers and microphone are) working and tested to sensible volumes. Headsets are strongly recommended in order to avoid feedback resonances, which could affect not only you but all fellow listeners with awful or even painful noises.
You may test your Audio-Devices using the basically installed Utilities of your operating system. e.g.: type into a [[
#'''Linux:''' "gnome-sound-recorder", (you may also check on: [[Linux software audio mixing with FlightGear]])