Wait what?! This is news to me! Are you sure... I mean I know you can do mixed 7.1 many different ways on PC, but Pro Logic IIx is on a lot of PC centric headsets, including the G35 that came out 4 years ago...
Like I said, it's a way of squeezing extra speaker channels into a two-channel signal, but it does NOT do so via HRTF techniques. Without the proper decoder, it's practically a plain stereo signal.
It was meant to enable surround sound on devices that could only output two analog channels, usually RCA connections fed to a receiver with a built-in Dolby Surround/Pro Logic decoder.
That was no longer seen as necessary once S/PDIF became more widespread and the Dolby Digital and DTS codecs alongside it...which actually serve a similar purpose in that S/PDIF only has enough bandwidth for two uncompressed PCM channels, but both of them throw out some data so they can cram a full six channels into the same bandwidth, thankfully discrete and free of the crosstalk issues that can plague a matrixed encoding method like Pro Logic, along with being automatically detectable. (Pro Logic decoding needs to be manually set.)
This is why Dolby Headphone surround processors like the Mixamp, Ear Force DSS and SU-DH1 feature Dolby Pro Logic II(x); it's to DECODE the signal much like it would Dolby Digital (and DTS in the SU-DH1's case) and extract all the individual speaker channels, and then apply Dolby Headphone to the now-separated speaker channels for the final surround effect.
The only time you need to ENcode Dolby Pro Logic II(x) on a computer is if you're piping it to an old A/V receiver that lacks S/PDIF input entirely, and chances are if you have the means to do that, your audio device can output straight-up Dolby Headphone anyway, making it pointless for this particular usage case.
That reminds me, I popped in to Micro Center today.
You guys would love it in there. They have most of the Asus Xonar cards right there on the shelves. The U3, DG, DGX, Essence STX, DX, DXS, etc.
Also AFAIK they have all the soundblaster cards.
The prices aren't necessarily spectacular, but it's mind boggling to walk around inside a real-life Newegg and see all this stuff in-stock and in physical boxes on the shelves.
Look at all dem soundcards!
*pics truncated*
Huh, I haven't seen any shelf quite like that in the Marietta Micro Center, but the fact that they still have some leftover X-Fi Titanium HD stock in that shot pleases me.
I should note, Micro Center is hands-down THE best place to buy CPUs and motherboards. Even with sales tax, their CPU prices are far better than Newegg and anyone else, their motherboards are aggressively-priced and frequently get a $30-50 combo discount with CPU purchases, and the $200 i7-4770K sale they had preceding Black Friday by a week can only be beaten if you qualify for Intel Retail Edge. (I bought my 4770K before then, but they refunded me thanks to price protection!)
If I move over to the northwestern US, I am definitely going to miss having a Micro Center store in the area. Apparently, Fry's Electronics has a major presence there, but again, their prices are nothing on Micro Center's.