Samsung TV Expert Audio Setting

[Socka]

Hi Everyone. Just purchased the Soundbar 700 and have connected to my Samsung UA55 via HDMI ARC. Wanted to know the best sound settings in my tv to get the best of the soundbar. The tv n soundbar is solely used to watch Netflix/ Prime.  

1. HDMI input audio format

PCM or Bitstream ?

2. Digital Output Audio format

PCM Dolby Digital or DTS Neo 2.5.?
Dolby digital plus n DTS is not highlighted. 

thanks a lot for your help.