Windows sound setting for dolby atmos

[lsklsk]

hi every one , im soo new to home theater discotions, so forgive me if my questions are so novice

my first problem is that i dont know what sound settign i must choose for the best 5.1.2 dolby atmos exprience . right now i do have a Marantz cinema 60 7.2 channle AVR and a 2.0.2 speaker system (2 clipsch floor standing and 2 focal in cilling speakers)
the reason for lack of subwoofer and other speakers are money for now , but i will by theme next month for sure .
the input signal comes from my windows pc with a 2.1 HDMI cable.
as you can see there are 2 photos here uploaded . one with "dolby atmos sound setting " and the other one with "5.1 sound setting " .
when i play a dolby content file it always show PCM in reciver as input signal ,
1st : is it ok ?
2nd : what is the best setting for best downfiring incilling speakers sound ?

 

[spirovious]

For atmos, keep Dolby atmos out. 5.1 is for older formats.

 

[Prateek-Epitome]

Congratulations on home theatre. Select Dolby Atmos setting

 

[Barun7]

While playing back, use Kodi rather than VLC. Kodi does a better job in terms of channel separation and surround sound.