>>12096109
I can only speak from my setup.
A sound card and a speaker system is necessary. Rest is software.
Sound card solved eax issues so now you only use creative alchemy to restore EAX in older games.
For /vr/ games, my decoder accepts optical present in most consoles that did dolby digital/pro logic like ps2/xbox/ps3/360. If you're emulating, pray that your emulator is capable of surround output. PS2 emulator still isn't capable of that to the best of my recoglection while GC solved that issues years ago, supposedly.
As
>>12096982 mentioned HDMI simplified things today so you no longer need a sound card and just need a decoder/system that accepts an HDMI.
HOWEVER
I still hear shit about EAX emulation not being accurate.
As well as older consoles lacking HDMI
And fuckery of splitting HDMI sound from image without adding lag
But as I said I can only speak for my system and have no experience in HDMI surround audio.