PCM Audio? Bitstream? Which one for PS4 Pro?

[Mister Vain]

I'm getting really confused by all the audio settings/options between my PS4 Pro, Samsung Smart TV and Samsung Soundbar...

So I know that PCM gives you uncomressed, raw audio and leaves the "processing" to the sound system. So I noticed in the PS4 settings, You can switch between PCM, Bitstream Dolby and Bitstream DTS. I left the PS4 on PCM for now.

My soundbar is the Samsung HW-N650 and it is connected via HDMI ARC.

Now, on my Samsung TV, I can change the HDMI Audio Input format to Bitstream or PCM. Im guessing PCM?? And the Digital Output setting is either PCM or DTS Neo 2:5. So PCM again?

So basically I have everything set to PCM right now. My soundbar setting is set to Surround sound mode with the Subwoofer enabled.

So with these current settings, am I getting the best surround sound? Or is there something I should change?