Getting 5.1 sound out of S/PDIF in games (Windows 7 Boot Camp)

[wilywampa]

I'm trying to get surround sound to work on my MacBook Pro in Amnesia and Crysis. I have an early 2011 MBP running Windows 7 in Boot Camp hooked up to an Onkyo TX-SR607 A/V receiver. In the sound options it looks like audio over HDMI only supports 2 channels, which is unfortunate because that would be the ideal setup. I am trying to use the S/PDIF port and a fiber optic cable to my receiver to get surround sound, but games revert to stereo for some reason. When I test the sound settings in the Properties page for Digital Audio (S/PDIF), I do get a test sound through each of the 5 speakers. What do I need to change for that to work in games?

 

[wilywampa]

I decided it's impossible and bought a Soundblaster X-Fi Surround 5.1 Pro USB Audio System. Works fine now. For the record, it's completely pathetic that my wife's cheap HP laptop recognizes the receiver and puts out up to 8 channels in all kinds of formats without any fiddling through HDMI, while my MacBook Pro can't do it at all. What's wrong with you, Apple?

 

[iBookG4user]

There a mini optical digital port on the laptop, I would've tried that if the receiver supports optical digital. I can get surround out of my MacBook Pro that way and hook it up to my 5.1 system.

 

[wilywampa]

Yes, that is the S/PDIF port, and it works when I test it in the sound properties, but games still put out stereo no matter what. Surround works fine through S/PDIF on the Soundblaster.