Apparently, I'm a fool and the "cool audio" in the game comes from audio system + windows + their basic system, not TrueAudio.

That feature was limited to a very narrow Radeon chips with additional DSP (R9 260 - 295x2, + some Kaveri and Carrizo APUs).

The basic audio still has spatial sound, reverberation, audio materials, and more. It's just accelerated in a different way. And it's still one of the best audio implementations in any game.