Thanks Patrick,
I’ll try with a USB cable tomorrow (I didn’t actually have a USB A male to USB A male cable, but it should arrive tommorow 
)
I would think that the HifiBerry Digi+ Pro should work with MQA.
Firstly, because Havel in this post says, that he’s using MQA with Digi+ Pro and NAD D3045 (as me).
Secondly, because HifiBerry support suggested to switch to HifiBerry OS and Roon to make it work (implying that Digi+ Pro should work with MQA).