How do I record Skype Call Audio in Gameplay Recordings?

[SH1M0]

How do I record Skype call audio in gameplay recordings?
Within my Audio Settings, I tried setting my System Sounds - Audio Device as my "Native Instruments Komplete Audio 6 interface's Main Out" and "System Defaut".
I'm not too sure if this has anything to do with recording the audio on my computer that Skype is outputting as well.
If anyone can help, I greatly appreciate.
Thank you for your time~