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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):

  • 21 Aug 2015 : Updated notes about Chrome shutter issues on Windows 10.
  • 01 Aug 2015 : Updated notes about Windows 10 compatibility.
  • 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.

Known issues:

  • GX is not turned off by default in Normal configuration for the following cards Xonar D2, D2X, DG, DGX, DG SI.

The 1.75 drivers come in two variants:

  • 1.75a

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).

Rev.2 changes:

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

Known issues:

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

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.


  • 1.75b

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

Rev.2 changes:

  • 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 on 64 bit OS.
  • 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 RTM compatibility (updated 27 Aug 2015)

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

Apart from driver issues there could be issues solely from Windows 10 sound system that would be fixed with future Windows updates. There is also a small chance that some things could break with future Windows updates.

100% compatible drivers when?

Because of the very slow development of the audio drivers by C-Media and the long time it takes for C-Media partners (ASUS and HTOmega) to release the new drivers it may take a while before we have a 100% compatible driver for Windows 10.  If we are lucky we will have new audio drivers in 2-3 months after Windows 10 RTM launch. As soon as new audio drivers became available I will release a new UNi Xonar drivers package.

About Chrome shutter issues on sites like YouTube. (27 Aug 2015)

Update 27 Aug 2015: The shutter issues on youtube are  fixed with the latest Chrome build released on 20 Aug 2015 (v 44.0.2403.157). Reports indicate that shutter issues are still happening for videos on other websites (eg. daily motion, facebook, instagram).

Update 7 Aug 2015: After some testing and some reading it seems that the shuttering issues are not related to the UNi Xonar drivers. I’ve got the same behavior with Realtek’s onboard audio and from what it looked liked. My guess the issue is caused either by Windows 10 or Chrome.

There is a Chromium issue opened here.

Here are some things you could try:

  • Change Chrome audio buffer size.
  • Change/keep sample rate to 44.1 kHz both in the audio panel and Windows Volume->Playback devices->(…) Audio Device Proprieties -> Advanced -> Default Format.
  • Change sample rates back and forward a couple of times.



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, preferably use XonarSwitch with separate profiles instead. Contains :

    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. Hans    19 Aug 2015 @ 18:26   

    Hi, since I’ve installed Win 10, the Fixsoundloop.bat doesn’t work anymore. It usually restarted my XonarD1 and fixed problems like the name says, or if the right or left speaker was louder/quieter than the other. Now it only displays the message:

    SERVICE_NAME: audiosrv
    WIN32_EXIT_CODE : 0 (0x0)
    SERVICE_EXIT_CODE : 0 (0x0)
    CHECKPOINT : 0x3
    WAIT_HINT : 0x1388
    click to start audiosrv
    Press any key to continue . . .

    SERVICE_NAME: audiosrv
    WIN32_EXIT_CODE : 0 (0x0)
    SERVICE_EXIT_CODE : 0 (0x0)
    CHECKPOINT : 0x0
    WAIT_HINT : 0x7d0
    PID : 556
    FLAGS :
    Started it! Click to fix Asus Xonar D2X
    PCI\VEN_13F6&DEV_8788&SUBSYS_834F1043&REV_00\5&D93DF5B&0&1000E6: Disable failed
    No devices disabled.

    Has the PCI number changed so this line from the .bat isn’t applicable anymore? “@devcon enable PCI\VEN_13F6”
    Any help would be appreciated.


  2. Tengoku    19 Aug 2015 @ 19:47   

    I was seeking through a YouTube video when suddenly continuous max-volume screeching glitchnoise was pounding through my speakers, way past the system volume level I was at. I’m wondering if there’s any precedent of these drivers fixing this specific issue. I think I’m going to ditch the card, I can’t risk damaging my equipment or my hearing testing such an atrocious bug. These cards are dangerous.

    Xonar Essence STX
    44.1k / Hi-Fi Mode enabled
    Default ASUS Windows 8 64 bit drivers
    Windows 10 Pro 64 bit
    Firefox 40.0.2
    HTML 5 YouTube player


  3. Luca    19 Aug 2015 @ 19:59   

    I want to report this problem “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.” too. My drivers are 1.75a and I run Windows 10, my sound card is Asus Xonar DX. I tried everything in mind but it didn’t work to re-balance the volume difference (like restarting the audio service, trobleshooting the audio hw/sw etc). I need to restart the PC to solve. It happened 2 times for now and always on my left speaker ( the main one ).


  4. mh0001    20 Aug 2015 @ 20:53   

    Just FYI, here is a post from an ASUS employee with a timeframe for new sound card drivers: http://www.hardwareluxx.de/community/f248/windows-10-support-mb-soundkarten-wlan-1082206-4.html#post23776651


    • rBose    20 Aug 2015 @ 22:51   

      What about Xonar D2/PM ?

      I couldnt find it on that list


    • CarvedInside    21 Aug 2015 @ 07:54   

      Thanks for sharing. At the moment ASUS seems to not release any new drivers, just changing the supported Windows version in the installer from their old Win8.1 drivers. So there might not be any new audio drivers in September or October either.


    • mzso    21 Aug 2015 @ 14:06   

      Ouch. October for my D1… And the crackling problem doesn’t seem to go away. (There were numerous windows updates)


    • PrMinisterGR    24 Aug 2015 @ 06:09   

      No planned update for the D2X, but planned update for the DX? What are they smoking?


  5. Daniel    23 Aug 2015 @ 17:06   

    My 6 August post seems to have been lost amongst the noise, so I thought I’d re-post it in the hope someone can help me…

    I have an Asus D2X card on an MSI motherboard, running Win7Pro64. The Asus S/PDIF output connects to an external surround receiver with in-built DTS/DD decoders. I’m trying to get DTS pass-through (from DTS-encoded FLAC music files), but all I get is silence. I started with the default Asus-supplied driver, and now have installed this UNi Xonar 1816/1822 v1.75a r2 driver, but they both do the same thing…

    If I go into the Windows Control Panel/Sounds, and Properties for the card (set for ‘Digital Output’), I can select DTS and Test, and the receiver displays ‘DTS’ and correctly plays the test sounds through my four speakers. But if I play a DTS audio track (and I’ve tried several different players), I just get silence from the receiver (and no ‘DTS’ indication). Stereo tracks play OK through the S/PDIF connection.

    Can anyone help me get DTS pass-through working?

    Thanks, Daniel


  6. Lindsay    26 Aug 2015 @ 05:30   

    I’ve just purchased a STX (not the STX II which is far too expensive where I live). It is replacing my trusty but aging D2X which has done sterling service for four years.

    I’m running Windows 10 Pro. Before installing the STX I in addition to uninstalling the old drivers I also did a thorough registry and file clean up using CCleaner and Driver Fusion. Once the card was in the PC I installed the 1.75a-r2 drivers (low latency option). They installed with no issues after a reboot. I’m happy to report everything works fine (also using Xonar Switch. So a big thanks to those who contributed to the development of the drivers and Xonar Switch.


  7. Pomegranate    27 Aug 2015 @ 18:48   

    Hi. I have a strange issue. It’s not a deal breaker, but if possible, I’d like to know how to fix it.

    After I install the latest Uni Xonar drivers for D2X card on Win 7 x64 and I restart, I get the blue CMedia Panel icon in the notification area. But on the next restart, the icon disappears. From the start menu, I found out its location is C:\Windows\System32\CmiCnfgP.cpl and I can make a desktop shortcut that way and use it.

    Now, to be completely honest, this started happening after a round of windows updates followed by disabling some windows services.

    In any case, can you tell me if a Windows service is required for the notification area icon to appear every time? Or is it something else, like a scheduled task?


    • CarvedInside    27 Aug 2015 @ 23:45   

      Hi. Which panel configuration have you selected when you installed the Uni Xonar drivers drivers?
      There is no service related to autostarting C-Media Panel, it is a startup entry which can be controlled from Run->msconfig->Startup tab->”CmiCnfg Dynamic Link Library” entry.

      You can either reinstall the drivers with C-Media Panel panel configuration, re-enable from msconfig or add a C-media Panel shortcut to Start->Programs->Startup.


  8. Rudolf    27 Aug 2015 @ 19:12   


    Is it possible to change the settings available in Xonar Control Panel without having it installed? I have only the drivers installed and am wondering if it would be possible to do so and if how?


    • CarvedInside    27 Aug 2015 @ 23:38   

      Hi. For some settings you could use the Standalone applications that are available in the download section of the post above. You could change settings in the registry but you have to know which key does what and I don’t have a manual for that. For the registry settings location see FAQ Q&A5.1.

      I’m curios, why do you not use one of the Xonar cards control panels (Asus Audio Center, C-media Panel or Xonar switch) to change the cards settings?


  9. Will    28 Aug 2015 @ 21:00   

    I am on Windows 10 64 bit using Asus Xonar DG (just purchased a few days ago), installed the latest driver update from this site. Everything was working fine for a few days, while I was playing LoL, the sound suddenly got distorted where I can only hear a faint background music, with no foreground vocals. This problem is happening within Chrome, VLC, LoL, basically from any audio source.I tried to install the official driver from Asus to see if it would work, but it says it’s incompatible with my OS. I will try to install the previous unified driver and see if it will work. But I am thinking that it may be a hardware issue now. Anyone experiencing similar issues?


    • CarvedInside    29 Aug 2015 @ 04:24   

      Disable GX if you didn’t already. If that does not fix things, you could try installing the drivers with Low DPC Latency option.



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