Saund over optical problem!

Community Archives WD Elements Play
1

i’m just disappointment from the optical saund it’s too low even though my home theater is 1000w and i’ve tried from my ps3 was perfect but with my WD entertament play was very low , so any one have a solution for this issue

note: i’m already tested on same move mkv on PS3 was very good

2

all files have the same issue or just that file?