Pirate Radio Power Button

I just dusted this thing off and got it running again. I used the image available here: PiratePython - Pirate Radio

It works pretty well, except the power button doesn’t seem to work correctly. It seems to just pause the radio, after which I get annoying static on the speaker.

This is the guide I follow to get my tunes up and running. The shutdown button works for me after the install.