Recording Game Soundtrack from PS4

OS 10. 16.6
Audacity 2.3.0
Hello guys,
Let me apologise straight off the bat for what’s probably an obviously nube question but I tried a search and got nowhere so here goes…
I’m tryna rip a couple of tunes from the Fallout IV soundtrack that I can’t lay my hands on for trying. So I’ve plugged the headphones output from the TV into my MacBook Pro, where Audacity registers an incoming signal but when I try to record I get nothing… I’m truly a novice at this kind of thing so once again my apologies in advance but any help and /or advice you can give is greatly appreciated :slightly_smiling_face: