In the game's audio options, X-Fi is selected, but as soon as initializing the game modules, it "knocks out" the driver, so it's useless. Selecting Realtek works without any problems but even if it is selected before opening the game, the x-fi stops working... I also tried disabling exclusive mode in Windows but that didn't work either.
As a Creative card user, I know that when the card stopped working due to some kind of conflict, Windows detected that the audio service had been cut off and worked erratically. Here it's different; Windows continues to function normally, along with YouTube and Foobar, but you can't hear anything from the X-Fi card.
Tonight, I tested extensively to see if there was a way to recover the audio without restarting the PC, but it wasn't possible, not even restarting the Windows Audio Services... Perhaps, as mentioned before, the anti-cheat system does something that overrides the driver. Cheers!