How to record single (left) channel microphone in ReLive with stereo output (realtime)

Please comment below if you know if there's a similar option in Windows 7 to help more people, thanks. Happy recording! Note: You can't hear the footsteps direction in fps game. lol Specs: Windows 10 Professional 64bit Gigabyte H81m-DS2 intel i5-4690 Sapphire RX570 Nitro+ 8GB GDDR5 4GB x2 DDR3-1333 Kingston KLEVV U610 SSD 240GB Hitachi 500GB