X HAT and HDMI Audio

I am trying to stream the Picade 2020 using a capture card, so I need HDMI audio as well as from the speakers built-in connected to the X HAT concurrently.

None of the EmulationStation configuration of changing the audio card and/or the audio device seems to work, and even so I would assume would only output to one or the other.

How do I configure this? I am willing to update and recompile the overlay or the asound.conf, but it’s not clear to me what to change or how to get that information.

I found a similar article that has no resolution: PicadeHAT audio from the picade AND hdmi, is this possible