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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.


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.

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 compatibility

UNi Xonar drivers 1.72 and 1.75 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 (like this one).


Driver Downloads (for Windows only):

  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)

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. Alex Ryttel    21 Feb 2015 @ 17:22   

    I have a problem which started couple versions back then went away without any logical reason. When I boot up my PC I can’t get any sound but the volume bar in windows shows that in fact the sound is processed. When I check device manager I can see two Asus Xonar D1 Audio Device, one with yellow exclamation mark. The only thing that helps is to turn off an on Asus Xonar D1 Audio Device without an exclamation mark but I have to do it every time I boot up the system. Tried reinstalling drivers, remove them, clean registry and this time the problem persists. Win 8.1 x64


    • CarvedInside    22 Feb 2015 @ 00:38   

      I’ve never seen this before. Really strange. What’s it say under Device Status for the Xonar card with the exclamation mark in Device Manger? By turning off you mean disabling it Device Manager? And what happens to the one with the exclamation mark, does it stay the same?


      • Alex Ryttel    22 Feb 2015 @ 01:39   

        This is what I did to fix this: disabled device with exclamation mark and the sound was gone but after rebooting everything’s back to normal and I can see that second device disabled in the manager. Is it possible that my D1 is damaged? I remember I had the same problem on win7 some time ago. The device status is “this device cannot find enough free resources that it can use. Code 12″ Really strange.


        • CarvedInside    22 Feb 2015 @ 03:19   

          That was what I thought of suggesting to see if it fixes things.
          I would be more inclined to think this is a Windows problem that would go away with a new Windows installation. But if you had the problem on Win7 then that might not be it. It is possible that the motherboard is at fault, make sure you have the latest Bios installed and you could try different PCI slots.
          Maybe you can check your card in another PC (maybe go to a friend) and see if you get the same issue. If you get the same behavior then there is probably something wrong with the card. If not, maybe the motherboard or Windows is the issue.

          This is a long shot, but you could also check if you EEPROM wasn’t overwritten.


          • Alex Ryttel    22 Feb 2015 @ 15:55   

            Thanks for help, I will look into EEPROM situation today and try to switch to a different PCI. Cheers


            • CarvedInside    22 Feb 2015 @ 17:42   

              You’re welcome. Let us know of any developments.


              • Alex Ryttel    22 Feb 2015 @ 19:56   

                So EEPROM is OK. Surprisingly after changing slots the the card doesn’t work at all. Even LED doesn’t light up. But when I switched back everything’s back to normal and I don’t see cloned device in the manager (maybe cleaning the dust in my PC helped?). I’ll let you know if it comes back. Cheers


  2. DisconnecT    22 Feb 2015 @ 01:20   

    Hi, I submit a bug in the drivers (Uni Xonar) on the Asus Xonar D2X error occurs in the form of waves and strong at a time when the rumbling bass work I tried to set the function 5.1 Flexbass but nothing, channel or DTS Dolby technology does not change anything , but the problem disappears as 2.0 or 4.0 of the Act or disconnect the cable from the equipment Center / Sub, I returned to the normal drivers, and there is no problem when installing the panel chose C-Media with activated GX Mode.
    He asked me to repair the error because the mods drivers seem to be a much better option, especially due to the C-Media Panel and reduced use of system resources.

    My system is Windows 7 x64

    PS. Sorry for my english but I’m Polish



    • CarvedInside    22 Feb 2015 @ 03:34   

      It’s really hard for me to understand what you wrote. Are you saying that you have a problem with bass coming from subwoofer or center speaker? And that you only have the problem when you install the UNi drivers with C-media Panel (GX enabled) configuration?

      Have you tried installing the UNi drivers with C-media Panel without GX? Have you tried different drivers, like 1.64 for example? Try those if you haven’t.


    • Alex Ryttel    22 Feb 2015 @ 15:52   

      DisconnecT mate write in Polish, I can translate ;)


  3. Andreas    27 Feb 2015 @ 21:11   

    First I want to say thanks for the drivers, I’m overall very pleased with them and the sound is great with my STX II card but I have one very strange problem. It’s pretty complicated and a video describing the thing would probably be better and since english isn’t my native language this could get messy, but I’ll give it a shot anyway and hopefully you will understand what I’m trying to say. I will be as thorough as possible so that you may be able to address this problem.
    The problem occurs when I’m listening to FLAC files in winamp, not all songs but quite a few, not in VLC though, so I think this is specific to winamp (hopefully). So, on to the problem; when listening to any of these specific songs I get crackling noise whenever I skip in the songs (move the slider with mouse or keyboard arrows). So far everything is normal except for the crackling, but when I open the UNI Xonar interface and choose Effect and change the equalizer from it’s default state to anything else (presets or just changing one of the bars up or down) the sound completely dies. No error message just completely quiet. This only happens after the crackling sound or when I close winamp, as long as I just let the songs play it’s fine. If I then set the equalizer to default the sound comes back, but if I want to use the equalizer in any other state I have to “reset” the soundcard by changing the analog output to something else and then change it back, i.e. from 2 speakers to headphones and back again. Then everything is back to normal again and I can use the equalizer, until I play one of the songs in winamp again. I have also got two blue screens connected to these crackles, the usual Windows 8.1 bluescreen with a message that says something like “driver_QRL_not_less_or_equal_STXII”, not sure about the QRL but something like that.
    I’m using Windows 8.1, STX II soundcard with Uni Xonar drivers 1.75b, 2 channels, PCM 44.1 Khz, everything else default except the equalizer as stated above, no microphone connected, Winamp v5.666 with allow 24bit enabled.
    I think the problem has gotten worse the last few days or maybe it’s just because I haven’t played those specific songs in a while or just didn’t notice it before. When using my speakers the equalizer is on default so that could be why I haven’t noticed it since it works fine at default. When I’m listening to my headphones I change the equalizer and that was how i noticed it. Maybe it could be after some recent updates in Windows or maybe it has always been there. The computer is approximately 2 months old.

    I’m not experiencing any other problems with the soundcard, everything works fine in games etc. with the equalizer enabled, I haven’t tried any other drivers for this soundcard or any other versions of winamp yet so I don’t know if this is consistent with any other versions, but since this happens to me it could be of interest for you to try to replicate this problem and maybe find a fix (for future versions). Sorry for the long post but I hope it makes sense and that you get back to me. In the meantime I’ll try a different version of Winamp to start with and then maybe some other version of the Uni Xonar drivers, I could also try the official drivers and see if the problem occurs there also.

    Best regards


    • Chris Leipold    28 Feb 2015 @ 02:17   

      Hi Andreas which output plugin do you use in winamp? Try to increase latency/buffer size in output plugin settings. I use Kernel Streaming ouput for my Winamp and experienced the same issue. But after increasing the buffer size one step in the output plugin its completley solved. If u are not using any Kernel Streaming Plugin i suggest u use the directsound output so go ahead and try increasing lateny / buffer size within the plugin and see if ur problem is solved.



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