Simply put, the Windows drivers for Asus and Creative sound cards straight-up ignores WASAPI exclusive.
If I recall correctly, this is easy to text using older-ish versions of foobar2000, e.g. v1.5.8, where you can manually set your output to specifically WASAPI exclusive rather than anything like that being handled automatically.
What will happen is that, if you try to play something of a weird sample rate, e.g. like the 32006Hz that Ocarina of Time (N64) uses, foobar2000 should complain… but, on Asus and Creative cards, it instead just always resamples to whatever your “default rate” is set to in both Windows as well as Asus or Creative’s own control panel (if I remember correctly, at least on Asus, if you don’t have both Windows’ and Asus’ sample rate set to the same thing, then double-resampling will occur).
It’s worth noting that ASIO doesn’t have this issue and no resampling occurs with it, so that may or may not be an option (it at least was for dedicated music playback through foobar2000 on my own Asus sound card).