They have different channels depending on which of their 4 screens you are watching from. On their website the recommend an app that works, but otherwise I would just call them to see what advise they can give on the matter.
I think it changes
92.3 is what I got, but when I drove too far from the drive in it did not work anymore.
I'm not sure they tell you when you get there and purchase your tickets you might be able to call them up and ask
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