Hey, I'm looking to get a quality stereo and I have a question about certain inputs. 

all I have is a TV and a PS4. 

What type of input should my receiver have in order to convey audio from PS4. 

Would the optical audio input do what I want? Just use the optical cable from tv to receiver? So Information would go from PS4 to tv then Tv to receiver? 

Becuase i I saw another stereo that had an hdmi input and output. Would that be something I'd need? So I'd plug PS4 to stereo, then stereo th TV?

Probably over thinking it. It's an incredibly simple set up.