I put together my Picade this weekend using the hat and a custom box (with the sound running through HDMI, rather than the speaker), and everything seems to be running hunky dory. However I am having problems with RetroPie randomly reporting the error
VolumeControl::init() - Failed to find mixer elements!.
When I set up my hat using the script on Github (https://github.com/pimoroni/picade-hat), I answered no to the question
Would you like to use the speaker amp on the Picade HAT?, so I’d expect the HDMI output to work fine. Is there anything I can try to stop this random dropout?