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unihead ico2

UNi Xonar Drivers 1.75 (post periodically updated)

Page updates/changelog (new or updated stuff in the post will usually be colored in red):

  • 28 Oct 2014 : UNi Xonar v1.75a rev.2 drivers are released.
  • 23 Oct 2014 : UNi Xonar v1.75b rev.2 drivers are released.
  • 22 Oct 2014 : UNi Xonar v1.75 drivers are released.
  • 06 Jan 2014 : UNi Xonar v1.72 and v1.64 rev.2 drivers are released.
  • 10 Sep 2013 : Good news everyone! If you ever wanted to save Xonar settings as switchable profiles,  access to most of the settings while staying away from the Asus Xonar Audio center or just wanted something better than the Standalone Apps then you should head on to XonarSwitch Beta page (by Giulio).
  • 29 Apr 2013 : Added Headphone AMP switch to the standalone apps pack.
  • See more post updates

UNi Xonar drivers are modded Windows drivers for the following cards:

  • Asus Xonar: DG, DGX, DG SI, DS, DSX, D1, D2, DX, D2X, HDAV, HDAV Slim, ST, STX, Xense, STX II.

  • Other C-Media CMI8788 audio chip based cards: Auzentech X-Meridian & X-Meridian 2G; HT Omega Claro Plus, 2, Halo, eClaro; Razer Barracuda AC-1. (more…)


UNi Xonar Features

FAQ & troubleshooting guide (updated 27 Feb 2015)

Useful tips & suggestions | Known issues & workarounds (updated 27 Feb 2013)

Having problems installing UNi Xonar drivers? Refer to this topic

Please note that these are modded drivers and there are limitations regarding how much the actual original drivers can be fixed this way.

A WORD ABOUT DONATIONS – Donation list here.

Let me first say that these drivers are free of charge for everyone. Those of you who appreciate my hard work and take pleasure in contributing, you can make a small donation (like 2 to 5$). Bear in mind you don’t donate for ASUS & C-Media intellectual property & work, you do it for the work that I have done.

CONTRIBUTIONS – Contributors list here.

Surely donating is not the only way you can support this project. You can submit your custom made skin, icon, application or any other little enchantments that can make UNi Xonar better. Lets not forget about spreading the word about UNi Xonar drivers and helping other Xonar owners.

RELEASE NOTES UNi Xonar 1818+ 1.7x

Release notes 1.75

UNi Xonar Installer changes:

  • Various changes and improvements done to the UNi Xonar installer.
  • Added warning message if installing the drivers would require Test Mode.
  • XonarSwitch is now automatically closed before installing the audio drivers.
  • Improved “Apply addons” function. Included .inf files from the drivers can now be dynamically altered. Documentation can be read here. Applying new 1.75 compatible versions of addons (like DHT4) will display the proper audio driver version now and users could now choose which addons they want to install once these are added to the Uni Xonar installer location.

The 1.75 drivers come in two variants:


Driver for previously supported cards. Same audio drivers as those in 1.72 (1816 for Win XP , 1822 for Windows Vista/7/8/8.1/10).

1.75a rev.2:

  • Fixed ASUS and C-Media Panels not working in Win XP.
  • Driver changes:
    • Includes updated driver installer and C-Media Panel.

Possible issues:

  • Missing Dolby Pro-Logic IIx options from C-media Panel. If you have this issue, you can use the “C-media Panel v1.62″ installer addon or install v1.72 drivers.


Driver mainly for STX II and  STX II 7.1 cards. It also works with UNi Xonar previously supported cards.

1.75b rev.2:

  • Fixed issue where installer did not apply the correct audio settings (e.g. to fix surround echo). Anyone who installed the previous 1.75b drivers should install the 1.75b rev.2.

Driver changes:

  • Includes updated ASIO ( , ASUS Audio Center and C-Media Panel.
  • Includes STX II version 11.5  audio drivers (created on 18 Feb 2014).

Other notes:

  • These drivers will work with the previously supported Xonar cards on Win Vista/7/8.1/10 but may require that you enable Windows Test Mode.
  • These drivers do not work for the other Xonar cards on Windows XP.
  • XonarSwitch does not currently work with these drivers. Support added in XonarSwitch v0.9.555.

Known issues:

  • ASIO in 64 bit mode does not work. The cause of this issue is the 64 bit asio  dll file from the original STXII drivers.

Possible issues:

  • Occasional Left or Right speaker imbalance or volume drop. This is a different issue that the L or R volume drop issue that some people have regardless of the drivers they install. There are 2 user reports for this issue.


Release notes 1.72

These drivers bring Windows 8.1 support.

Driver changes:

  • Updated audio driver to version 1822 for Windows Vista/7/8/8.1. Still using 1816 for Windows XP.
  • Includes updated driver installer, ASUS Audio Center and C-Media Panel.

Other notes:

  • New icon for UNi Xonar installer. Thanks to propheticus for his contribution.
  • ASUS Audio Center and C-Media Panel tray icons now have higher resolution icons. Useful for >100% DPI settings.

Release notes 1.71

Driver changes:

  • Updated audio driver to 1821 for Windows Vista/7/8  and 1816 for Windows XP.
  • Includes updated driver installer

UNi Xonar Installer changes:

  • Fixed some issues with Driver cleaning module
  • Improved and fixed some potential issues with UNi Xonar Installer

Known issues :

  • C-media Panel: Enabling and disabling “7.1 Virtual shifter” option disables stereo upmix. Use “Stereo upmix switch” to re-enable it or you can use the C-media Panel v1.62 addon (it will revert to an slightly older C-Media Panel version)
  • In some cases,  WASAPI exclusive playback is interrupted by playback from other audio applications. More details here.  Fix: If you don’t use S/PDIF, disable Digital Output from Control panel->Sound. It’s confirmed that the audio drivers included in 1.70 don’t have this issue.
  • Win Vista/7/8, there are reports that you cannot play sound through S/PDIF and headphones at the same time.

Release notes 1.70

Driver changes:

  • For Windows Vista/7/8 it includes 1818 audio drivers. For Win XP it includes 1814 audio drivers.
  • Includes updated versions of Updated C-media and Asus panels.
  • Fixed HTOmega Claro 2 driver support.
  • Fixed driver signature issues for the other non-Xonar cards that were present in previous release.

UNi Xonar Installer changes:

  • Added option to apply addons at driver installation.
  • Improved Low DPC Latency option. Now it allows access to C-media Panel as well. And Asus Audio Center won’t autostart after driver installation like it previously did.
  • Improved Driver Cleaning process. Now it will clean the Panel and HsMgr(GX) processes startup entries too.
  • Reduced the overall installer size (from 13MB to 7MB)
  • Replaced Windows XP driver installer with the same one that’s being used in Windows 7. Please report if there are any malfunctions compared to previous UNi Xonar driver releases.
  • Removed “1777 drivers + Asio 1.0″. This option lives on as an addon.
  • Rev 2: Applied all UNi installer fixes from 1.71

Known issues :

  • C-media Panel: Enabling and disabling “7.1 Virtual shifter” option disables stereo upmix. Use “Stereo upmix switch” to re-enable it or you can use the C-media Panel v1.62 addon (it will revert to an slightly older C-Media Panel version)

Release notes 1.64 rev.2

  • All the improvements and changes done to the UNi Xonar installer from 1.7x versions have been incorporated into this release (like support for addons).
  • Updated C-Media Panel with the one included in 1.72 release.

Other notes:

  • New icon for UNi Xonar installer. Thanks to propheticus for concept and contribution.
  • ASUS Audio Center and C-Media Panel tray icons now have higher resolution icons. Useful for >100% DPI settings.

Read Previous Release Notes


Note about Windows 10 Tehnical Preview builds compatibility (updated 28 Mar 2015)

UNi Xonar drivers above v1.64 will work in Windows 10 TP but since the drivers are not made for Windows 10 TP there could be some issues here and there (e.g.,  this one). Different drivers could work differently so if you encounter any issues try installing the other UNi Xonar versions.

Due to changes within the Win10 TP builds, the very slow development of the audio drivers by C-Media and the long time it takes for C-Media partners (ASUS, HTOmega)  to release the new drivers, it may take a while before we have a 100% compatible driver for Windows 10.  It could take up to 2-3 months after the final release of Windows 10.


Driver Downloads (for Windows only):

  1. UNi Xonar 1816/1822 v1.75a r2  mirror1  mirror2   (latest)
  2. UNi Xonar STX II 11.5 v1.75b r2  mirror1  mirror2   (latest)
  3. UNi Xonar 1816/1822 v1.72    mirror   
  4. UNi Xonar 1816/1821 v1.71    mirror
  5. UNi Xonar 1814/1818 v1.70   mirror   
  6. UNi Xonar 1814/1815 v1.64 r2   mirror    (proven stable)
  7. Older versions : v1.63 beta; v1.62 betav1.54 ; v1.61 ; v1.53

Official addons (Addons documentation):

  1. “1777 drivers + Asio 1.0″ aka “ASIO 1.0 Patch”. Info.
  2. C-media Panel v1.62 (fixes stereo upmix turning off for v1.64 rev.1 drivers)

3rd party addons page here.

Standalone applications for changing settings : 

1. Standalone apps pack* & mirror (legacy, check XonarSwitch instead) containing :

    1. Front panel switch v3.2
    2. SampleRate switch v1.2
    3. Microphone Array Enabler v1.1 – Might be useful if you have an microphone array
    4. HDAV HDMI enabler v1.0 – This application hasn’t been tested please submit feedback if it works or not. It appears it is not needed anymore.
    5. Acoustic Echo Cancellation enabler v1.0 – Useful for other Cmedia 8788 based cards that lack this setting
    6. Stereo upmix switch v1.0
    7. 7.1 virtual speaker shifter enhanced profile v1.0 – Profile created by Cu. This profile should enhance the effect of positioning in games when using Dolby Headphones and 7.1 virtual speaker shifter. Please provide feedback about this profile. Demo.
    8. Headphones ohm Amp switch v1.0  – Works only with the cards that support this.

*All these apps are based on scripts created by Virus. Before running the files, close any audio source/application.

2. Other Xonar related applications:

    1. Front Panel switch new versionmirror (by Virus; notes)
    2. ASIO settings viewer/changer (ext link)
    3. Audio re-starter for sound loop problem for Win Vista/7/8 by Razord93 (ext link)
    4. Xonar-EQ – Control Xonar equalizer settings from your Android phone or tablet. By Sascha.


  1. Zaim Sattar    14 Apr 2015 @ 00:44   

    I’m unable to install the latest Unified drivers, keep getting the following error “Please Plug-In Uni Xonar Audio Device!” I have a Xonar HDAV 1.3 SLIM

    The official drivers seem to install fine. Any ideas? I’m using windows 8.1


    • CarvedInside    14 Apr 2015 @ 20:01   

      I see you finally managed to make a new comment instead of replying to someone else’s that has nothing to do with your problem. Now how about reading the post above, there is a link “Having problems installing UNi Xonar drivers? Refer to this topic” or you could have searched for “Uni Xonar Please Plug-in…” or other things. I’m not trying to be smart ass but if you would know how many times I’ve been asked this question and I’m kinda sick of people not giving a damn about my spare time. So please next time try to make an effort and pay more attention to things already written and try searching for an answer before asking. Also, when asking for help you should not hold out any essential details, in your case you have Win8.1 x86 or x64 and which is the exact version of the drivers you are trying to install.


    • arsnova    23 Apr 2015 @ 16:14   

      Hi, great work to both the UNi Xonar drivers and Switch creators! A question, why don’t add support to OpenAL Soft when installing the drivers instead of the deprecated and proprietary’s? Thanks! : D M. C.


      • CarvedInside    23 Apr 2015 @ 23:09   


        First I want to make a remark. You’ve replied to someone else’s comment that has nothing to do with the content of your comment. Instead, you should have made a new comment using the form at the bottom of the page.

        Now getting to the matter at hand. Thanks for bringing this up. I was considering replacing the OpenAl with the OpenAL Soft in future versions. Have you tried it with the Xonar drivers? I have to know that it would work fine.


  2. Arindel    15 Apr 2015 @ 12:07   


    Is it possible to have 7.1 Virtual Speaker without enabling Dolby Virtual Speaker? I have Xonar U3, but I had a DGX which had C-media panel which could do that, but not with Xonar panel.
    I’d like to have that 7.1 feature without adding any additional reverb.
    PS: I know Uni Drivers don’t work with U3, but figured you guys must know some method to do that within Xonar panel or with some hack-ish method.

    Thanks in advance!


    • CarvedInside    20 Apr 2015 @ 21:21   

      Hi. I found the registry value for enabling only 7.1 Virtual Speaker. It may not work for U3. It may also be overwritten once the ASUS Panel loads so you may need to prevent it from starting. The ASUS Audio Panel for the internal Xonar’s does that.

      How to enable it: 1) Find the Xonar U3 registry settings, see FAQ Q&A 5. I suspect you are using the U3 in another system that the one with the DGX, if not you will have 2 registry keys (folders).
      2) Add/Change the “EnableXear3D” value data from “00 00 00 00″ to “01 00 00 00″.
      3) You can export the settings so you can load them again if necessary.
      4) Disable and re-enable the U3 from Device Manager or restart the PC.

      Hope this helps.


      • Arindel    24 Apr 2015 @ 18:11   

        Thanks, that worked! Though, I was dissapointed to see that it’s not really the same as DGX. Moving R to L position and I still hear sounds in R speaker when only L speaker should have sounds from L and R channels (I did disable everything before the regeddit trick).

        Anyway, thanks for showing me that trick, certainly something to play with.


  3. J.K    16 Apr 2015 @ 07:56   

    Howdy. It seems that output works now without crashing using optical output and Dolby Digital Live.


    • CarvedInside    16 Apr 2015 @ 19:10   

      Please use the reply button properly. When replying to an existing discussion use reply button floating on the right of the comment you are replying to.
      If you are using a NoScript browser addon then you should disable it so that “reply to discussion” button works correctly.

      In your case you should reply to this comment. If you’ve pinpointed what caused the crashes, you should let us know what it was.


  4. Piotr    17 Apr 2015 @ 01:40   

    hello, i use this drivers for auzentech meridian 2g and works in windows 8.1, buy why this drivers create shortcut in menu start for xonar thing which dont work becouse this is not xonar


    • CarvedInside    17 Apr 2015 @ 02:59   

      Hi. Because it’s a minor inconvenience, there are a few who have non-Xonar cards that use UNi Xonar drivers and making the change would take significant time.


      • psychok9    22 Apr 2015 @ 18:04   

        Thank you a lot for you work!
        I’ve X-Meridian 7.1 too, and I hope that it will work with next Windows 10 😐


        • CarvedInside    23 Apr 2015 @ 22:56   

          I will try to continue to support the X-Meridian & HT-Omega cards in future UNi Xonar drivers. Lets hope that C-Media does not remove those cards from the audio drivers.


  5. Samir    18 Apr 2015 @ 21:21   

    I want to start by thanking you all who helped develop and continue to develop and maintain these drivers, as well as those of you who have made donations, have helped spread the word about these drivers, or otherwise contributed to the cause of this project.

    The first time I discovered these drivers is when I started researching latency issues with ASIO and Propellerhead Reason, and when I realized that ASUS was not going to do anything about it. They would not have updated the drivers to work well with Windows 8 either if they had not been pressured by users (not saying that those drivers do work well at all, in any Windows version they supposedly support). Later, I learned that Windows 10 technical preview had no support for my ASUS card either. At that point, I had to switch. Up until then, I have always been using the official drivers. Seeing now what options I have with UNi Xonar, I probably will never switch back to the official drivers. I never had the chance to test out these drivers with Reason; I stopped using the software instead, until I buy a new audio card I thought… but I never did.

    What makes matters worse for me is that the Realtek audio device on my motherboard is not working at all. I think I fried some audio ports once when I made a wrong connection, although the digital in and out appear operational but I’m not sure if they ever worked again after that. I’ve been using the Xonar Essence STX since then. I’m on Windows 10, build 10049 now and there is still no built-in support for this audio device. Unlike with Ubuntu 14.10 or Fedora 21 where it works OOB. The Windows 10 preview appears to have overall issues with audio devices across the board, with many audio devices.

    Some individuals do for free what big name companies can’t (won’t) do for pay. Perhaps there is still hope for humanity after all.


  6. BustyLoli-Chan    23 Apr 2015 @ 13:11   

    I’m having trouble with the stereo mix volume on my ASUS Xonar Essense STX. I noticed while using these drivers that the volume of the stereo mix audio recording stream seems to be dependent upon the windows volume mixer level for the speakers themselves. I don’t know if this is how this is supposed to work, an oversight in the development of the driver itself, or if this is related to a bug in the windows vista+ audio mixing system which, quite frankly, sucks.

    To more specifically describe my issue, I’m trying to record stereo mix while listening to my computer with headphones. Not wanting to lose my ears I have the windows audio speaker volume at about 25. This seems to produce almost no sound on the stereo mix channel. Adjusting the volume of the stereo mix channel (which is already at 100%) only further reduces it’s threshold. Another peculiar bug I seem to notice is that even when I turn the windows speaker volume down to 0 the levels on the speaker VU meter in the windows playback for the ASUS Xonar Essence STX look completely unfazed, something I would expect/want from the stereo mix stream.

    Why is the stereo mix volume dependent upon the actual speaker volume? This seems counter intuitive and just “wrong”. Is there a way to shut this off?



    • CarvedInside    23 Apr 2015 @ 22:51   

      It unclear to me if you did you noticed this with original drivers? The UNi Xonar drivers you’ve checked? Your OS is?
      I am unfamiliar with the issue you are describing. To know if it’s a issue related to the Xonar drivers or the windows audio mixing system you could check if you get the same behavior with the onboard audio.


  7. Chris    25 Apr 2015 @ 05:28   

    I just wanted to thank you for these drivers.
    I used them for a long time, and then during my attempt to try out Pro Tools and get it to produce sound, I tried reverting to stock drivers as part of the troubleshooting.
    Immediately upon playing this song I noticed a distinct… lack… in the bass. I don’t have the vocabulary, except to say it was weaker and more hollow perhaps. I’ve just gone back to the uni drivers and the delicious warm sound has returned, so thank you again!



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