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UNi Xonar Drivers 1.75 (post periodically updated)

POST updates changelog (new or updated stuff in the post will usually be marked in red):

  • 28.10.2014 : UNi Xonar v1.75a rev.2 drivers are released.
  • 23.10.2014 : UNi Xonar v1.75b rev.2 drivers are released.
  • 22.10.2014 : UNi Xonar v1.75 drivers are released.
  • 06.01.2014 : UNi Xonar v1.72 and v1.64 rev.2 drivers are released.
  • 10.09.2013 : Good news everyone! If you ever wanted to save Xonar settings as switchable profiles, or 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).
  • 29.04.2013 : Added to the standalone apps pack  the Headphone AMP switch .
  • See more post updates

UNi Xonar drivers are modded 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 CMI 8788 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 19.07.2014)

Useful tips & suggestions | Known issues & workarounds (updated 27.02.2013)

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.


Driver for STX II and  STX II 7.1 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.


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 TP  compatibility

UNi Xonar drivers 1.72 and 1.75 will work in Windows 10 TP but since the drivers and not made for Windows 10 there could be some issues here and there (like this one).


Driver Downloads:

  1. UNi Xonar 1816/1822 v1.75a r2   mirror   (latest)
  2. UNi Xonar STX II 11.5 v1.75b r2   mirror   (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)

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. Ram Nathoo    05 Nov 2014 @ 16:39   

    I installed the ASUS Xonar drivers and they really suck. I tried to download UNI Xonar drivers from the links give but my virus scanner stopped the download and removed it saying it contained malicious software. this was both the v1.75a and v1.72.
    Where can I download a safer drivers?

    R Nathoo


  2. Ram Nathoo    05 Nov 2014 @ 22:42   

    Thanks. I removed download from quarantine in the virus scanner and installed Much better. However, still not getting output from speakers e.g no sound from front left but from front right. Its late in the evening but will try and seek if swapping cable connections make any difference. Watch this space.

    R Nathoo


    • Ram Nathoo    07 Nov 2014 @ 14:02   


      I tried cable swapping got very confusing. So I uninstalled the drivers and cleared out drivers as suggested in FAQ then reinstalled the drivers. The sound output from various speakers is as it should be and others is toppy turvy. E.G. using the speaker selection on the Xonar panel –
      when you click the L speaker the sound comes out of Front left as expected.
      When you click centre the sound comes out of side left speaker.
      When you click the right speaker the sound comes out of the front right as expected.
      When you click the sub the sound comes out of the side right speaker
      When you click the side right the sound comes out of the front right and centre speakers
      and when you click the side left the sound comes out of the centre speaker.
      How do I resolve this?
      I have disabled the on board sound system in bios. I was wondering if switching this back on will any difference. Will this also restore the front jack for headset as I get no sound out of this as well.

      R Nathoo


      • Ram Nathoo    08 Nov 2014 @ 13:17   


        Problem sorted retried swapping cables it worked this time.

        R Nathoo


        • Brian van den Berg    10 Nov 2014 @ 19:07   

          Yeah it’s weird, i’d guess you have a DX? The information they give in the manual and what’s on metal plate is completely different from what the actual sound channels are. I don’t know how ASUS managed to screw that up.


          • Ramchandra Nathoo    11 Nov 2014 @ 21:58   

            Hi, It seems they have carried the omission into the DGX card as well.


        • Ramchandra Nathoo    11 Nov 2014 @ 22:01   

          I have also noticed that when I test the sound quality from each speaker using the ASUS interface the sub woofer output is very low and not very clear compared to the same test done with the windows playback menu. Have I missed something in the installation?

          I have noticed that everytime I try to configure the recording using he windows recod menu the computer crashes and gathers info to send and the computer restarts. Is this due to the sound card or the drivers?


  3. mirh    06 Nov 2014 @ 18:01   

    ASIO 64 bit driver doesn’t work in foobar 2000… It says: “Unrecoverable playback error: Could not locate the specified virtual ASIO device”
    Xonar DX with v1.75a rev.2 on W7x64


  4. micky    08 Nov 2014 @ 13:07   

    hi, congratulations for the continuous modding drivers asus. I hear the sonic differences between the original drivers Asus Xonar is the last UNi v1.75b rev.2 with my ST. I made measurements with RMAA and I noticed, however, that the original drivers give better measures such as THD and SNR. What do you think?


    • CarvedInside    08 Nov 2014 @ 18:06   

      Thanks. I haven’t done any RMAA tests for 1.75b drivers. Will do some tests later and see if I get the same behavior.
      Did you have the same sample rate in Xonar Audio center when you did the tests? What was it?

      You can try the 1.75a drivers as they will be the same as original drivers in this regard.


      • CarvedInside    08 Nov 2014 @ 23:46   

        I’ve ran the RMAA tests and the overall results are the same between the drivers. With both drivers (1.75a vs 1.75b) I used C-Media Panel, 16bit as depth output, 44.1 KHz as sample rate on Win7 and Xonar DX card. Ran the tests twice for each driver. I like to add that there is no reason 1.75a drivers would behave differently or worse than using original drivers, especially if compared to same version audio driver (1822). From time to time I’ve done RMAA tests between newer and older audio drivers and never seen a difference, at least not in favor of older drivers.

        Either you had different settings on the original drivers(different sample rate maybe?) or you used an older driver version that somehow performs better. What’s the version of the original drivers you’ve tested? What’s your OS?


  5. Brian van den Berg    08 Nov 2014 @ 15:25   

    Anyone else have a problem on Windows 8.1 x64 that sometimes installing C-Media Panel fails to install properly? I reinstalled my PC completely and i installed Uni Xonar for my DX, but C-Media Panel didn’t install properly(When trying to search for C-media only some weird file shows up in the results which says that there’s no Hardware supporting C-media)


    • CarvedInside    08 Nov 2014 @ 18:07   

      I am not aware of such issue. Which drivers have you tried?


      • Brian van den Berg    08 Nov 2014 @ 22:58   

        1.75a rev 2


        • CarvedInside    11 Nov 2014 @ 01:13   

          It is unclear to me if you’ve managed to get C-media Panel working. Let me know.


          • Brian van den Berg    11 Nov 2014 @ 17:56   

            It only happens sometimes, i don’t know i never do anything different when installing. However i have noticed something strange when installing:

            Whenever the installer finishes it asks me to restart, i press restart but then the installer is keeping me from restarting so i have to force restart, or cancel and click “Finish” in the installer. Is this a bug? Maybe its also the reason why this happens. Last time i installed i click to restart later, pressed finish and then restart.


            • CarvedInside    12 Nov 2014 @ 21:33   

              I don’t think this is why C-Media does not work sometimes.
              You are prompted to restart by the audio driver installer (made by C-media) which is launched by UNi Xonar installer. In most cases you don’t need to restart after audio driver installation. If you wish to restart after driver installation, do it manually after the UNi Xonar installer finishes.


  6. micky    10 Nov 2014 @ 12:53   

    Hello I used the latest drivers with the original 64bit Windows 8.1.


    • CarvedInside    11 Nov 2014 @ 01:02   

      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.


  7. PS    11 Nov 2014 @ 04:05   

    Something is strange with WINDOWS 10 x64, Xonar DX and all your current drivers 1816/1882 & STX II 11.5 1.75

    When playing different games, and having youtube usually open in Chrome these errors occur. (or to say when using sound it happens, if no audio is playing it doesn’t happen. And it seems to require a game playing, as I don’t remember it happening from just youtube. But it is all games, BF4. Trove, EVE Online, TF2, Titanfall. Though it is possible it would, as usually I have a game open pretty often if I am near my computer (not giving much time for it to occur otherwise).

    The Audio Service will crash. I will have to right click and Speakers on the Taskbar and click on Playback Devices, and it will restart the Audio Service, making me having to reopen any applications that use sound as they won’t be registered. This happens a lot.

    To make matters worse, seemingly 60% of the time this happens, restarting the Audio Service will do nothing at all. Sound won’t come out at all. I have to uninstall and re-install the audio driver, as rebooting the operating system will not fix the sound issue at all. Again, usually when I have no sound at all, restarting the computer will no fix it, I have to clean uninstall the driver and re-install.

    This happens on average 1 to 5 times a day. I can’t for the life of me figure out what could be causing it.


    • mirh    11 Nov 2014 @ 23:11   

      Audio re-starter mentioned on the bottom of the article might *simplify* your problems hopefully..


  8. Sungbung    12 Nov 2014 @ 00:49   

    I am having issues with both the Asus Xonar DG drivers and the Unified Xonar Drivers on Windows 8.1 64-bit.

    They both install fine, but the buttons on the interface will flicker/blink a lot and then the application crashes after sometime (few minutes to an hour later).

    The drivers worked fine when I had Windows 7 last week and i’m not sure why it’s happening with Win 8.1 and how I could go about fixing it.


  9. Dimitriy    15 Nov 2014 @ 22:13   

    I was unable to set a Bit-Depth other than 16-bit in ASIO Control Panel after update to 1.75a rev.2. Then i’ve opened ASIO Control Panel from foobar, not from XonarSwitch and set 32-bit, now it’s ok. Just if someone will face it too.


  10. MonolithD    16 Nov 2014 @ 10:33   

    Hi, just want to say thank you for your hard work! Been using these drivers since I got my card and never had 1 problem =) All the best!


  11. AMOCO    16 Nov 2014 @ 12:03   

    So I am getting my ASUS Xonar DG Sound card Wednesday,And this driver will work for it?
    And I use a pair of Turtle Beach Z22’s headphones connected to the DSS2 Dolby Digital Surround Processor,So I will be using the S/PDIF out(Optical Toslink) for the audio out.
    Now my other question is: Do I set the onboard audio in the BIOS to (Auto,Enable, or Disable)?Because I need the USB for the Mic.


  12. Jonney    18 Nov 2014 @ 19:58   

    Hi, I have been using your drivers for a long time and thank you for your hard work. A friend told me that when I speak on Teamspeak 3 it sounds like am lagging however am getting no packet loss and he recommended that I use DPC Latency to see if I had any problems. I did notice if am using no sound related programs am sitting at 60-80µs if I launch for example TS3 and join a server it jumps to 230µs-334µs. The same happens if I launch VLC. Am using Windows 7 64-bit Service Pack 1 with UNi Xonar 1816/1822 v1.75a r2 with Xonar DGX. I have re installed everything and the same results happen again.


    • CarvedInside    19 Nov 2014 @ 21:09   

      DPC latency is a different thing than Input(Line-in or microphone) latency. I don’t think DPC latency would have a impact on speaking lag. There could be multiple things that could be responsible for a delay in Teamspeak conversation. Internet latency from your end or your friends end could be responsible for example.
      You had this problem using original drivers or UNi Xonar with Normal configuration?

      You could try and see if you get the same lag with microphone connected to the onboard audio card instead.


  13. Corey Simmonds    19 Nov 2014 @ 20:10   

    Uni Xonar drivers (175a r2, I think) are still crashing in Windows 10 occasionally. It happens very seldom, but currently they are the only thing cited in even the very occasional BSOD.


  14. Todd Secrest    23 Nov 2014 @ 04:09   

    Any chance the Unified Xonar Drivers will in some future release support the C-Media CM8828 chip-set?



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