Must mostly be the Netflix ones I haven’t seen. I can only think of the most recent Phoenician scheme

Isn’t that probably why they differentiated them in the sentence you quoted?

You could plug a 1/8" or 3.5mm TRS coupler onto the end of the cassette adapter, then you would have an input port for the tunai firefly ldac’s aux out. If you were so inclined I guess, I have no horse in the race