Brand new guy here, already posted this over in the Nameless PC oriented thread, but I thought I'd post it here as I didn't see any mention of it when I glanced through earlier. If you've got a Creative card and Windows 7, you can pass the CMSS software processing along to ANY audio device (including external USB DACs) to bypass the circuitry on the internal card. This pretty much seals my purchase of the FiiO E17 which I was already looking at as a good partner for my DT770 Pro 80s, being able to retain the virtual surround feature of my internal card while using a great external DAC just sweetens the deal for me. Here's how to do the handoff of CMSS processed output completely in software:
Before following this checklist, make sure your current audio device is fully configured for CMSS (Windows configure speakers wizard is done and set to a surround setup, Creative Console speakers set to headphones, CMSS-3D is enabled, Crystalizer is disabled, "Disable Sound Blaster enhancements" under the Sound Blaster tab of your default audio device's properties is unchecked). I like unchecking the sub in the Windows wizard here to create a virtual 5.0 rather than a virtual 5.1 because I think it may help tame the overbearing bass some of you were talking about on the 770 80 ohms. The Beyers are already mashing together the bass output from the other 5 virtual channels into a pair of very bass-capable headphones, do you really need a virtual sub as well? Also, as we all know, subwoofer bass position is something your brain can't pinpoint, so I don't see why you'd want lots of it in your pinpoint accurate virtual surround. I think I remember hearing a noticeable difference with this changed in my limited A-B testing with a ripped BD of Evangellion 1.11 (the last battle scene has explosions and technobabbling jumping ALL over every channel when I listen with my physical 5.1 Acoustic Research HC6, so far it's by far the best test of virtual surround I've tried yet), but I wish I had another pair of Beyers to do a real A-B and not rely on my terrible memory/imagination.
1. Right click on your volume tray in Windows 7 and select "Recording devices"
2. Select "What U Hear" and click "Properties" (cringe inducing grammar there Creative)
[Note - you do NOT have to set this as the default recording device]
3. Select the "Listen" tab and check the box marked "Listen to this device"
4. Under the drop down marked "Playback through this device:" select your desired DAC
5. Make sure "Continue running when on battery power" is selected as a software passthrough should have no effect whatsoever on your battery life
6. Select the "Levels" tab and set it to something comfortable, as the volume control for the Creative card's standard output will have no effect on the volume of the software recording device.
7. Enjoy listening to CMSS freed from the noisy and inferior hardware confines of your internal soundcard!
I just noticed as I was creating this guide that on the properties>levels>balance menu of a audio device that's been configured as 5.1 or 7.1 under Windows speaker config has a separate balance for each channel. I wonder if this actually works on either the Creative card or other DAC to turn down the sub or turn up areas that are weaker in the soundstage. I'll try and do some more research on this when I get the time to do a better A-B comparison of a bunch of different software settings.
Hopefully someone else finds the steps I've written in this guide useful, I know I did. Now I just need to go pick up an E17 from somewhere and see how it sounds with CMSS passed along to it in BF3...