Hello,
I tried to search for previous posts regarding my questions but found none; sorry if this has been previously covered.

My aim is to create my original songs with BIAB and then use them in a live show situation as back up to my vocals and acoustic. I will be using a laptop so I will need some sort of external (usb) sound card?, that will allow audio out to my PA system. Also what cabling will I need to go from the external sound card (if needed) to the PA system?
Is it even possible?
Any product tips appreciated.

Thanks...Earl