How does ActionCable play with Heroku?

Colleagues,
I have been mulling with the idea to replace a polling strategy I currently use in my #RoR app with ActionCable. The think is that my app runs on Heroku lower tiers (hobby) and hence i have access to only one dyno. Does anybody know how the full-duplex communication that ActionCable realises dovetails with Heroku dynos? E.g. can I have one dyno listening to multiple channels (of the ActionCable)? Any advise or insight will be greatly appreciated.

Thanks in advance