Right, but the real Gunbird 2 game may not use the same sound driver program as the DSF rip. That would presumably affect if unaligned access occured or not. Try this: boot GB2, dump AICA RAM once it starts playing, and check for the driver version string near the top of RAM. Or alternatively, have AOSDK dump a RAM image, load that into Makaron, and see if unaligned accesses occur.
 Most DSF rips use version 2.50 because it's known where to patch that version so it doesn't clear the SH4 command buffer before reading it, and it's assumed the sequence data remained compatible. In order to be more accurate games should probably be ripped with the real driver they shipped with, but in practice that hasn't turned out to make much difference (Neill Corlett's Skies of Arcadia test DSF using the game's driver does seem to sound subtly different from KS's full rip using 2.50 but I could be hallucinating ;-)