The odd thing is that Wing Commander does load with DOSBox in UART mode. But on my "real" machine it locks up. Gateway however, shows the correct behaviour under DOSBox un UART mode (Can't find IRQ 2 message...).
It's weird and totally unexpected, but enough reason for me to use Gateway, or another Legend game for testing full Roland MPU401 compatibility.
I do like the AudioPCI. A lot to be honest. Mostly because it's so damn cheap and for the money it packs a lot of value:
Good compatibility, Cheap as chips, signal is also very clean, no hiss or noise or any of the issues ISA cards come with. Even has SPDIF (I haven't tested this because I don't have the cables, but you can initialize the DOS driver and set it to digital instead of analogue).
The Soundscape driver compatibility is also a nice bonus. Games auto detect it as Soundscape right away. Music quality is subjective, but I do quite like the 8MB version. Again considering how cheap these cards are, how can you complain 🤣
It's a shame these cards don't work on modern mainboards though. Because games like Prince of Persia, Doom, Duke Nukem3D or Descent do run very well on a modern Intel or AMD machine in real DOS. But without sound or music it's quite a barebone experience.