One jack two signals?

[randomperson135]

my friend recently bought a turtle beach earforce 11(i think) and he can't get his mic to work and what i think the problem is is that the mic input and audio output from the computer are all in one jack and the audio output for the headphones don't pick up the mic signal. even when you plug the jack into the mic input the mic still dosen't work and now you have no sound. is there any none expensive thing that can be done or will he have to buy something?

 

[soundguruman]

Open the audio software.
Locate the mixer, microphone level, and other audio settings.
Download the entire manual from the manufacturers website, and look up the audio jack configuration.