How to Capture Hardware Accelerated Audio(EAX, OpenAL) With OBS

How to Capture Hardware Accelerated Audio(EAX, OpenAL) With OBS

Let me begin with clarifying that this is not a software solution. Since true hardware accelerated sound is directly outputted through analog audio outputs, it cannot be captured by the windows audio stack.

We will be using 2 sound cards, one is the card with Hardware acceleration(A), and one is the dumb pass-through card(B). In this example these are:
Card A: Creative Sound Blaster X-Fi Titanium HD
Card B: Realtek onboard audio (MSI B550 Tomahawk)

Steps required:
Wiring:

  • Using a RCA to 3,5mm cable, connect Card A audio out to Card B line-in port
  • Connect your monitor device(headphones, speakers) to Card B output
OS Sound Stack Setup:
  • Set main output device as Card A
  • Make sure Card B line-in is not muted
OBS Setup:
  • Add Audio Input Capture
  • Set device to Card B line-in

And you are done. Any audio fed to Card A with EAX/OpenAL should be playing on your monitor device as well as being captured by OBS.

I registered just to post this, so, any feedback is welcome.
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