Mopidy Iris not playing thru pirate audio

I also can’t get Mopidy working. I have the Pirate Audio speaker. It works fine for playing sounds from VLC, Scratch 3, and Python. I can’t get a peep out of it using Mopidy, though. Using my PC browser, I can change the volume slider shown on screen, but I can’t reliably discover music on the Pi and can’t get any sounds out of it. Are any updated instructions available for getting it working? I’ve had a good search online and I can’t find a fix. Thank you.