Setting Up A Virtual Audio Cable In Linux:

sudo apt install pavucontrol

To Open Pavucontrol In Terminal:

pavucontrol

Now Let's Edit The Following File:

sudo nano /etc/pulse/default.pa

Add The Following Line At The Bottom Of The File: 

load-module module-null-sink sink_name=Virtual_Sink sink_properties=device.description=Virtual_Sink

Should All Be "ONE LINE" And Save