My computer is picking up audio from my headphones

My computer is picking up audio from my headphones

im trying to use the built in microphones on my earphones but all the audio input is going through where the output should come out not the built in microphone this is happening with all my audio devices. i know that realtek can make an audio input into an output bit i cant find anyone with this problem. this only happens when i plug it into the input jack but that's the only way it'll detect anything.