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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.

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.

Known issues:

  • The installer is showing “Warning: Test mode to be enabled!” message by mistake if Xonar Xense selected as card.


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


Notes about Windows 10 Technical Preview builds and Windows 10 RTM compatibility (updated 5 Jun 2015)

UNi Xonar drivers above v1.64 will work in Windows 10 TP but since the drivers are not made for Windows 10 there could be some issues depending on Windows builds and audio settings used. Different drivers could work differently so if you encounter any issues try installing the other UNi Xonar versions.

Due to changes within each Win10 TP build, 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,  this could take up to 2-3 months after the RTM release of Windows 10. I will release new UNi Xonar drivers package as soon as new drivers became available.


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. Laamapalmu    28 Jun 2015 @ 00:18   


    I have a problem, If I listen to a song or play a game along the song, either the song or the game gets quiet and some songs with loud sounds get quieter, like something is “throttling” the sound. Anyway to fix it?


  2. memonk    28 Jun 2015 @ 02:15   

    Hey guys,
    Despite never having any problems with the original asus drivers (no sound lag in games, movies,… at least) I got curious and did a clean uninstall of the original asus driver and installed
    the UNi Xonar driver with the minimal latency option. My latency unfortunately is always around 1000µs (spikes at 1800µs; measured with dpc latency checker) which is VERY far from the values promised :(
    I did a little research on dpc latency and which drivers tend to cause values like this. Having uninstalled my wifi drivers (latencymon reported ndis.sys being the “worst” dpc related thing on my system) nothing changed.
    I am not very deep into this topic and would be very happy if anyone could help me :-)
    Another question: if I never had any problems using asus or Uni driver, should I even care? I think yes, because lowering dpc latency seems to be a very nice thing to do concerning gaming and overall performance.
    What i did so far:
    disable speedstep
    disable usb legacy support in bios
    disable acpi 2.0 in bios
    disabled onboard devices i do not use
    uninstalled vmware network adapters
    uninstalled hamachi
    I will upload logs on request 😉
    Thank you VERY MUCH in advance and sorry for my english :)


    • CarvedInside    28 Jun 2015 @ 03:39   

      Hi. UNi Xonar drivers with Low DPC Latency option can only improve things on the Xonar drivers end. I don’t think the problems with high DPC latency are from the Xonar drivers, it would be if you would have <100µs DPC latency with the card uninstalled. That being said, you should repost your problem in the dedicated DPC latency page as this is not a Xonar drivers problem. While you are there read the page and the comments posted previously. In your repost you should specify which OS do you have, if you’ve disabled HPET, which program(s) have you used to measure DPC latency on your system.


  3. Charun    28 Jun 2015 @ 16:43   

    I commented on a while ago about audio with my card, XonarD1, specifically where the audio would only be controller-able with on the left channel and the right channel would be “stuck” at set volume, this problem was pretty damn random, happened more often when having full volume of the windows mixer, with loud music for example.

    Anyway I have managed to “fix it” without restarting the pc or reinstalling the driver, which can be a finicky at the best at times….if you don’t do it in the correct order and end up having to restart and reinstall the driver.

    So the fix is you need to turn your windows volume mixer to full then open device manager, look for your sound card under “Sound, Video and game controllers” look for your sound card name, Asus Xonar D1 Audio device in my case and right click to select disable, then go to, services, Control Panel >Administrative Tools > services restart the Windows Audio service, and go back to device manager and re-enable the sound card. And open your favourite audio player to test and all /should/ be well.

    Please not I have not tested this on anything else besides my D1, this may or may not work, if it doesn’t work the first time just start again.
    I could write a simple bat file to make it one touch when i get some time.

    hope this helps someone.



  4. Vic    29 Jun 2015 @ 10:53   

    Hello, I have a permanent problem. Sometimes, one of my speakers begin quiter, than another one. Usually, this occurs after I launch any daw with asio support. Also, sometimes, after starting windows, there is no sound. This problems cures only with reboot or reconnecting my card in device manager. Is there any another solutions?

    Xonar d1


  5. SLK350    29 Jun 2015 @ 13:31   

    Why are there no driver updates for the STX II cards? They are Asus premium cards and have been out for over a year yet we have only a “beta” driver. That’s just amazing. Seriously thinking of going back to good old SopundBlaster, atleast Creative tries to fix their drivers.


    • CarvedInside    29 Jun 2015 @ 20:25   

      Because this is how ASUS supports its audio cards. They do not care.
      It’s useless to complain here. You should complain to ASUS support and on their forums.


  6. huhn    29 Jun 2015 @ 14:16   

    windows 10 10130 x64
    asus essence stx
    HPET active

    i have a problem with audio drops/distortions. i used LatencyMon to see DPC spikes and the highest DPC spike with cmudaxp.sys is 440 us so no real issue. but the real issue is the interrupt to process latency when is spikes to 4000 us i can hear an audio issue and most important the spikes are way worse with the normal driver and more often.

    i will remove the soundcard and check this issue with the onboard card too.


    • CarvedInside    29 Jun 2015 @ 20:38   

      Have you read this comment above? How about the DPC latency article (especially 4.Tips & tweaks in reducing DPC latency) and comments there? If you didn’t please do.


      • huhn    30 Jun 2015 @ 00:36   

        i read and followed the instructions most of them but that doesn’t fix my issue. DPC Latency Checker doesn’t even work for windows 8 so i used latencymon and calculated the DPC with is 0.056 ms with a spike of 0.26 ms in this short test so it is ok.

        my problem is the interrupt to process latency and i’m not even sure if the driver have any effect on these.
        so with other words do the driver have an effect on high interrupt to process latency?


  7. Gyrxiur    30 Jun 2015 @ 18:32   

    In latest Windows 10 10158 drivers install, but sound don’t work, when I try to test sound in sound applet, in says that it cannot play it. Also recording tab in that applet freezes if I switch to recording tab.


    • Kenshihh    01 Jul 2015 @ 06:05   

      Same here, newest build broke something


    • Kenshihh    01 Jul 2015 @ 17:19   

      had to deinstall the driver, restart, install the driver, restart and it works again.
      but if you touch any speaker settings or change the hz settings, the driver will fail and you have to start all over again.
      until 10130 everything worked perfectly fine


      • rBose    01 Jul 2015 @ 19:56   

        I remember trying them on 10074 and they were horrendous.
        I have a 5.1 speaker system and I could only use 2.1 with standard Hz

        Hope for a W10 version soon


    • Chris Leipold    01 Jul 2015 @ 19:36   

      Yeah for me its only if i am changing the sample rate. But when i am setting it in the windows audio panel and switch between 16bit/44.1KHz and 24bit/48KHz the sound comes back.


  8. Chris Leipold    01 Jul 2015 @ 19:35   

    Yeah for me its only if i am changing the sample rate. But when i am setting it in the windows audio panel and switch between 16bit/44.1KHz and 24bit/48KHz the sound comes back.


    • Chris Leipold    01 Jul 2015 @ 19:37   

      Hey carved sorry had the old problem. I clicked reply for sure and it didnt reply correct.


      • CarvedInside    03 Jul 2015 @ 01:36   

        No problem. Thank you for letting me know, seems to be a persistent problem but I have no clue why sometimes comments aren’t placed under a discussion thread. Please redo the comments that aren’t placed properly and I will delete the old comments.


  9. Frank Vicari    01 Jul 2015 @ 20:27   

    I can confirm that there are issues using a Xonar D2X and the current drivers.

    Any changes made to the card causes the card to stop working until a removal and reinstall of the drivers.


    • Frank Vicari    01 Jul 2015 @ 20:47   

      More info…

      Clean install – Windows 10 10158 and 10159
      Xonar D2X
      Asus P6T SE
      Xeon X5680

      If you need more info, let me know.


      • Frank Vicari    01 Jul 2015 @ 20:52   

        Even more info…

        Been reading over at My Digital Life and it seems to be across most sound cards.

        Any changes to the sample rate causes the entire sound stack to stop working, though ASIO drivers seem to work fine (can’t verify, just relating what was posted). A reboot does not fix, you have to remove and reinstall drivers to get sound back.


    • CarvedInside    03 Jul 2015 @ 01:39   

      Can you redo your comments under the existing comment thread about the issues with build 10158.
      And I want to ask you about how your comment got to be placed outside the comment thread, do you remember if you’ve clicked reply on Gyrxiur comment or instead you clicked new comment by mistake?



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