I hope someone can help me out. There's another thread out there that is similar to what I'm about to post, but some key parts of the advice are unclear to me and my issue remains.
I have a 4.1 speaker setup running through an ASUS Xonar DX 7.1 card. There is absolutely no option to disable the center speaker in the Asus software, so I followed the advice in this thread to enable a phantom center:
I've had mixed results. I have ffdshow running fine and enabled the 2/0/2 setup in the "Mixer" tab checked along with the LFE box selected, but it does not always work correctly. It is my understanding that ffdshow should override everything else, but many applications (games in particular) are still running audio through a center speaker that does not exist. For example, Far Cry 3 works fine, yet Assassin's Creed 3 and Batman Arkham City do not at all.
I have enabled 4 audio channels and 5.1 under "analog out" in the Xonar DC Audio Center and I have unchecked the center speaker in Windows 8's sound management settings. A piece of advice in that previous thread mentions to ensure that ffdshow is enabled for ALL applications, but I cannot find anything that does that. I played around with "DirectShow control" in ffdshow and enabled no limitations for the application as well as setting the "merit" control to "very high," which also does nothing. I also tried to uninstall the Xonar software and just have Windows and ffdshow manage the audio, but the sound card drivers must be hardcore linked to the audio center because doing that completely removes the sound card from device manager altogether.
Does anyone have any ideas of what I could do? Is there a setting in ffdshow that I'm missing? Is there something in the Xonar DX audio center that I need to check? Frankly, I think it's ridiculous that the card's software doesn't have the option to remove or mute an individual speaker. I don't like center speakers and prefer the 4.1 setup to 5.1, especially on a desktop. Moreover, I find it completely absurd that the Xonar DX manual lists 4.1 as an option but links it with the 4.0 page, and following the limited directions printed there just results in 4.0 sound. Thanks in advance if anyone has any advice.