Easiest way to create player targets for Music Assistant to connect to an active speaker via SPDIF for <$30 ? Squeezelite seems like a good candidate, but unsure how to connect to SPDIF

I'm struggling to find the easiest solution to connect a set of active speakers that have BT/Optical (Toslink)/Coax. I currently use a tablet to stream Deezer via BT, but I want to be able to use them in Music Assistant....