Solved! if i use the arc with a hdmi cable, do i still need to hook my dish box to the soundbar

Solution

This suggests the dish box is already hooked up to *something* the TV I guess?

Dish box to TV is fine, then the audio signal path is: Dish ---> (HDMI no ARC) TV (HDMI ARC) ---> SB.

So when u watch TV you want to:

Tell TV: Select (HDMI no ARC) Input. "This is my source."
Tell SB: Select (HDMI ARC). "This is where my audio is coming from."
Why not just try it? It takes two HDMI cables, and ten minutes configuring your TV. If it does not work - see how you can connect STB to the SB,
 

This suggests the dish box is already hooked up to *something* the TV I guess?

Dish box to TV is fine, then the audio signal path is: Dish ---> (HDMI no ARC) TV (HDMI ARC) ---> SB.

So when u watch TV you want to:

Tell TV: Select (HDMI no ARC) Input. "This is my source."
Tell SB: Select (HDMI ARC). "This is where my audio is coming from."
 
Solution