Windows 10: Microphone only picks up audio from headphones?

I currently have a pair of razer kraken pro v2's which are plugged into my computer via a headphone splitter. My computer detects my headphones just fine (audio working and all), but when it comes to using the microphone it doesn't seem to pick up my voice at all and only picks up audio coming out through the headphones.

:)

 

Microphone picks up headphone audio.

I've had this problem with 2 different types of headsets where the sound coming to my headphones can also be heard through my mic. It's not that the headphones leak the sound since the mic still picks up sound even if I scroll down the headphone audio
to the lowest with the volume wheel. There has to be some setting in windows 10 or some problem with windows 10 that makes it think the headphone sound is part of the microphone's recorded sound.

 

Microphone picks up headphone audio.

Hi,

A microphone is a sound receiver device that can record sounds and convert it to an audio file. To help us identify your concerns with your microphone, we’d like to ask you a few questions:

• What is the exact brand and model of your microphone?

• Which version or build of Windows device are you using? To know, press
  Windows + R to open the Run window. Type winver and press
  Enter. A new window will open showing the version and build number of your Windows device.
  
• What were the recent changes made on your computer before you experienced this issue?
  
• What troubleshooting steps have you done so far?
• Did you receive any error messages?

• Did you use this microphone normally before? If yes, can you tell us if this was working properly?
• Have you already contacted your manufacturer of your microphone for troubleshooting instructions?
• Can you check if the device was installed properly in the Device Manager? To check it, follow these steps:

1. Press Windows key + X.

2. Click Device Manager.

3. Expand Sound, Video and game controllers.

4. Check if the devices under it have a yellow exclamation mark.

In addition, you can visit this link:
How to set up and test microphones in Windows 10 to know how to reinstall your microphone on your
PC.

We are looking forward to your response.

 

Microphone still unable to pick up sound from Dragon Speech

Not a techie at all sorry but follow your general drift which is interesting. I've now got a mike input (USB Pro Sound) but how do you make the connection to the headphone output as there's two separate wires ?