Xbox 360 - Optical line-in pass through 5.1 to optical line-out on an iMac?

Hi guys, i'm in the market to purchase a new 5.1 surround sound system for my room and the following issue has been purplexing me.
IS it possible to daisy chain my XBOX 360 to my iMac with optical cables and pass through 5.1 surround sound to the decoder on the sound system?
So i'd have an optical cable from my xbox to the line-in on my iMac. I'd use Rogue Amoeba's Line-In app to pass the sound through to the optical line-out and through to the sound system.
(I know it works using stereo sources, but i don't know about 5.1 digital sound.)
I also know i could just connect them both to separate optical ports on the sound sytem, but i'm trying to listen to 2 sources at the same time. (5.1 from XBOX and music from iMac).
Any thoughts on this are appreciated!

I'm convinced things work like this:
The SBX-Fi receives the encoded SPDIF.<
The drivers decode it into the 5 digital audio signals. This siimply regenerates what was put into the encoding and has no effect on its "volume."<
The 5 digital audio signals are sent to the SBX-Fi hardware, as is.<
The signals are widened (not sure about the SBX-Fi, but for SBLi've-/SBAudigy-series card it's 32-bits with IIRC 4 bits for headroom, which is 24dB) at input by the SBX-Fi hardware. The additional headroom is probably able to handle most effects/mixing which might happen, but might produce a signal which would clip on output if the intermediate results produce a digital volume over 00%.<
The master output volume operates on the output signals before they are narrowed.<
The output signals are narrowed (dithered) and distributed.<
If that's correct, it means you should be able to simply lower the master output volume in the soundcard mixer; and that presumes something's going on like high Crystalizer settings, or something; to elminate clipping distortion.
-Dave
?[email protected]

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XBox 360/Audigy: SPDIF IN pass through to SPDIF OUT not working with 5.1

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Hi I have the same probleme, exept that I have succesfuly pluged my home theater receiver and the 5.1 works. Just my subwoofer seems not to work properly. Like when I plug it into a digital dvd player it works very nicely. but when pluged into the sound card it seems that it dosnt have any signal for it.
ANy clues??? I know i pluged everything finely I have tested the sound test for each speaker and sub to, from the receiver and from the creative software the sub seems to work but very quietly even if I cran the volume up on the sub or in the software , the sub dont work as it should.
1 thing I remarqued is that the sub works occasionaly in some movies. When listening to the music it not working and I dont understand that.

HP Omni 27 - Xbox 360 sound doesn´t play through HDMI

Product Name and Operating System:
HP Omni 27 - 1001es - Windows 7 Home Premium
Description of the problem:
Hi everybody: I have plugged my Xbox 360 through the HDMI cable to my Omni 27 computer. The image is well seen, but there is no sound from the console available.
Could anyone help me to fix this problem?
Thanks in advance.
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Hello ipillo,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I understand you connected your XBox 360 to your HP Omni 27-1001es Desktop PC and are getting the video, but not audio. I ran into this myself once on my XBox and here are the steps I used to fix it:
Step 1. Click on Settings
Step 2. Click on System
Step 3. Click on Consol Settings
Step 4. Click on Display
Step 5. Click on Display Discovery
Step 6. Choose Disable
Step 7. Restart
Please re-post if you require additional support. Thank you for posting on the HP Forums. Have a great day!
Please click the "Thumbs Up" on the bottom right of this post to say thank you if you appreciate the support I provide!
Also be sure to mark my post as “Accept as Solution" if you feel my post solved your issue, it will help others who face the same challenge find the same solution.
Dunidar
I work on behalf of HP
Find out a bit more about me by checking out my profile!
"Customers don’t expect you to be perfect. They do expect you to fix things when they go wrong." ~ Donald Porter

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Thanks for your replies everyone, and thanks to NI for this great forum!
The last solution appears to be pretty close to what I'd like to do. If I understand you Robert, I would attach a DAQ to my PC via USB and would control that device via software, then the DAQ connects to a digital output controlled relay (looks multiple wires, and screw-on connections) and then there would be separate wires connecting 'channels' (my term) from the relay to individual button wires inside of the gaming controller? The signals coming from the controller following this would therefore appear as normal.
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Xbox 360 - Optical line-in pass through 5.1 to optical line-out on an iMac?

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