Just watching football and can't find any options for crowd noise?
BT Sport creates the broadcast, not Roku. You should probably be directing this question to BT.
Well they say press the red button. But of course Roku doesn’t have one.
this has still not been sorted?
As @makaiguy mentioned, BT is broadcasting the audio. Only they can provide an answer to this. If they're telling you to press the "red" button, their customer service staff obviously have no clue about what device you're using. No Roku remote has the colored buttons you see on remotes for other devices.
I will contact BT then, its hard to get hold of them. thanks