I ended up getting a Roku Ultra this past November when they went on sale. There is audio for both ATSC 3.0 and 1.0. Most of the ATSC 3.0 channels are encrypted now. Until the drm issue is resolved, I won't be able to view those channels. ATSC 1.0 channels can still be viewed. They just don't come in very well for me.
Clarified to add that I bought the Roku Ultra NOT the Roku Ultra LT. It was $69 on Black Friday.