UNi Xonar Drivers 1.81 (post periodically updated)

Page updates and announcements:

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, STX II, Xense.

  • 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. (view full list)

Linked content:

  1. Introduction
  2. UNi Xonar Features
  3. FAQ & troubleshooting guide (updated 2 Sep 2016)
  4. Having problems installing UNi Xonar drivers? Refer to this topic
  5. Useful tips & suggestions | Known issues & workarounds (updated 22 Mar 2016)
  6. UNi Xonar installer addon documentation
  7. Poll: Rate ASUS Xonar driver support


  1. Release notes
  2. Windows 10 compatibility


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


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 (minimum $2 because of fees). Bear in mind you don’t donate for ASUS and C-Media intellectual property and 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 icon, application or any other little enhancements that can make UNi Xonar better. Let’s not forget about spreading the word about UNi Xonar drivers and helping other Xonar owners.


Release notes 1.81a

Driver for all supported cards. Includes 1825 audio drivers for Windows 10. Unlike previous releases, the 1825 audio driver will only work in Windows 10.

Driver changes:

  • Windows 10: Updated audio driver to 1825 (built date: 22 ‎June ‎2016, made by C-Media).
  • Updated C-Media Panel.

Other notes:

  • Replaced C-Media driver uninstaller with UNi Xonar driver cleaner.

Rev. 2 changes:

  • Added support for STXII cards in Asus Audio Center, cards will be detected as STX by Asus Audio Center but feature wise almost everything should be there.

Known issues:

  • 1825 audio drivers have an issue when the audio card is uninstalled, disabled or the drivers are overwritten, resulting in a system crash. In order to avoid the uninstall system crash I’ve come up with a workaround  that’s presented below
  • Asus Audio Center: GX button is no longer showing. It has to do with 1825 audio drivers and there may be a reason why C-Media removed it. I’m not sure if it’s worth it to bring the GX on/off control back.
  • STX II:  Asus Audio Center is missing the gain 16/32 ohms for headset.

Possible issues:

  • STX II: XonarSwitch might not work. Need more feedback on this.
  • Audio playback through headphones and SPDIF at the same time isn’t possible anymore. Original report. Need more confirmations.
  • DSX & probably other cards: DTS Connect with 5.1 speakers does not work. Original report. Need more confirmations.
  • There are reports that the sound quality of these audio drivers is different. RightMarkAudio tests that I’ve made didn’t show any significant differences between v1.81a and v1.80a.
  • The 1825 audio driver may have higher DPC latency than previous drivers. Original report. The tests that I’ve made didn’t show any difference in DPC Latency between v1.81a, v1.80a and v1.80b drivers. Maybe it’s has to do with the settings that are being used.  My test where done with 2.0 analog output.

How to uninstall 1825 v1.81 drivers: In order to avoid a system crash while uninstalling 1825 drivers you will need to play an audio file before proceeding with the uninstall process. Restart system after the uninstall process is done.


Release notes 1.80

UNi Xonar installer changes:

  • Added DPI interface scaling to the installer.
  • Added card autodetection and if the audio card is not detected it will show an error message with possible reasons for that.
  • Improved driver cleaning. It uninstalls all copies of the Xonar/C-media CMI8788 drivers that are present in the Windows driver repository. By installing drivers with “Run driver cleaning” option you won’t be able to use “Roll Back Driver” option for the audio card in Device Manager.
  • Changed the driver installation procedure. Added a fail safe driver installer that should help in those cases where you were required to manually install the audio driver or install it in safe mode. Silent installation is always on and its user option has been removed. If standard driver installation gets stuck (does not finish after 100 sec) it is automatically closed. If standard driver installer fails to install the drivers then an alternate driver installer is launched. If that fails too, you will get notified by the installer that driver installation failed.

Driver changes:

  • Windows XP: Added support for other CMI8788 cards.
  • Xonar DG, DGX, DG SI: Front Panel jack detection should now work if it did with the original drivers.
  • Fixed GX not being turned off by default in “Normal” configuration for the following cards Xonar D2, D2X, DG, DGX and DG SI.

Rev. 2 changes:

  • Improved and fixed some problems with the new driver installation procedure.
  • Added different messages based on why installation failed.
  • Fixed “Front Panel Microphone” not working by default.

Rev. 3 changes:

  • Increased the delay between driver cleaning and driver installation procedures. Might help in some installation failing cases.
  • Fixed the “Warning: Windows running in Test Mode or with Disable Driver Signature Enforcement is required!” message not showing up if needed in combination with the detected audio card.

The 1.80 drivers come in two variants:

  • 1.80a “Standard”

Driver for all supported cards. Replacement for 1.75a driver. Includes 1816 audio drivers for Win XP and 1823 audio drivers for Windows Vista/7/8/8.1/10.

Driver changes:

  • Windows Vista/7/8/8.1/10: Updated audio driver to 1823 (built date: 2 Jun 2015, made by C-Media).
  • Includes updated driver installer, ASUS Audio Center and C-Media Panel.

Other notes:

  • 1823 audio drivers are the first drivers released for Windows 10 by ASUS/C-Media. Whether they perform any better than 1822 or STXII 11.5 drivers remains to be seen.
  • Xonar STX II cards: Drivers work with STXII cards but the changing audio settings may not work with ASUS Audio Center and only with C-Media Panel. Installation on Windows Vista/7/8.1/10 x64 requires Windows running in Test Mode or with “Disable Driver Signature Enforcement” option.

Known issues:

  • STXII: Asus Audio Center does not work. You need to download this patched version and copy paste it over “C:\Program Files\UNi Xonar Audio\Customapp\”.

Possible issues:

  • Microphone stops working if running specific programs. If you run into this issue please report it in a reply to the original report. If you run into the issue you can switch to v1.75a drivers or connect the microphone to the onboard audio card microphone input.
  • WASAPI playback issues might occur with some soundcards
  • Occasionally when waking PC up from sleep the Xonar card does not output any sound.
  • Drivers might stop installing on Windows 10. Try 1.75a, 1.80b or 1.81a instead.
  • Windows 10 Creators Update: Windows would not boot after these drivers where installed. If you run into this problem you have to boot Windows in Safe Mode and remove the audio drivers. Original report. I could not reproduce the issue.
  • 1.80b “STXII”

Driver maily for STX II and  STX II 7.1 cards. It does work for the other UNi Xonar supported cards too. Replacement for 1.75b driver. Includes STX II version 11.5 audio drivers (built date: 18 Feb 2014, made by C-Media).

Driver changes:

  • Includes updated ASIO (, driver installer, ASUS Audio Center and C-Media Panel.
  • Windows XP: Drivers now work for all UNi Xonar supported cards. These were not working with 1.75b drivers.

Other notes:

Rev. 2 changes:

  • Fixed “Asus Audio Center” not working properly and getting replaced by C-Media Panel when installing with “Normal – Asus Audio Center” configuration.

Rev. 3 changes:

  • Fixed some installation issues when drivers were installed on STXII cards (like missing driver uninstall entry in Programs and Features,  incorrect C-media panel name).
  • Fixed a bug where optimal card configuration was not being applied if the drivers were installed without the “Re-enable stereo upmix” option.

Possible issues:

  • Microphone stops working occasionally or when changing audio playback settings (DS->WASAPI). If you run into this issue please report it in a reply to this comment. If you frequently run into the issue you could try v1.75a drivers if possible or connect the microphone to the onboard audio card microphone input.


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.

Rev. 3 changes:

  • Fixed GX is not being 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 “Standard”

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 “STXII”

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.

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.

Known issues:

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

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


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.

Rev. 3 changes:

  • 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.

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

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 compatibility (updated 10 May 2017)

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.

Update 20 Apr 2017, 10 May 2017: Windows 10 Creators Update (build 1703) reported issues so far are:

Your feedback is welcome.  For those of you who run into severe problems after the Creators Update build upgrade you could roll back to the previous Windows 10 build (#1, #2). If that is no longer possible you can download an older Windows 10 build from here and install it without a internet connection present.

To prevent Windows 10 upgrade to Creators Update you need to either disable “Windows Update” service from Control Panel->Administrative Tools->Services or disable the Creators Update update with Wushowhide tool (guide on how to use it).

Update 30 Aug 2016: Thank you for the feedback so far. Based on the feedback received there shouldn’t be any problems installing the drivers on Windows 10 Anniversary Update (build 1607) whether it’s an upgrade or a new installation. One user reported that audio card was recognized only when installing the drivers when booting with Disable Driver Signature Enforcement option. Apart from drivers installation aspect, this new Windows build brings new problems for some users like the following reported ones: crackling or loud popping sound in the speakers, audio card not being detected sometimes or disappearing in Windows and 5.1 analog not working. For those of you who started having problems only after the Anniversary build upgrade you could roll back to a previous Windows 10 build (#1, #2). If that is not possible you can download a older Windows 10 build from here and install it without a internet connection present. To prevent upgrading to build 1607 you need to disable “Windows Update” service from Control Panel->Administrative Tools->Services.

Update 3 Aug 2016: Microsoft made changes to driver signature policy with the Windows 10 Anniversary Update (1607) that could make the Xonar drivers not working/installing anymore. There are some exceptions from this driver signature enforcement. At the moment it’s unclear to me if installing the drivers in Test Mode or with Disable Driver Signature Enforcement still works. I’m interested in hearing you experience under this discussion thread.

Update 28 Nov 2015: The Windows 10 Threshold 2 update does not seem to fix many of the sound issues that where present so far and it may introduce new ones. In my opinion Windows 10 is a very buggy OS, the only things working fine are the spying of its users(#1, #2) and the periodic removal of user preferences and programs(#1, #2, #3, #4).

Update 19 Oct 2015: The audio fixes from Insider Previews >= 10547 will probably be included in the upcoming “Threshold 2” update that will be released around November 2015.

Update 1 Oct 2015: The Windows 10 development team is fixing some audio issues with Windows 10. The fixes where made available for testing starting with Windows 10 Insider Preview build 10547.


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.

  • Update 25 Jan 2017: 1825 audio drivers for Windows 10 are available. These are the first audio drivers that only work on Windows 10. Hopefully they will perform better than those that supported also Windows 7 and Windows 8.1.
  • Update 01 Oct 2015: 1823 audio drivers are the first drivers released for Windows 10 by ASUS/C-Media. Whether they perform any better than 1822 or STXII 11.5 drivers remains to be seen.

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

  • Update 27 Aug 2015: The stutter issues on youtube are  fixed with the latest Chrome build released on 20 Aug 2015 (v 44.0.2403.157). Reports indicate that stutter 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 stuttering 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 (Windows only):

OSDriver package name & download linkAudio driver ver. & build dateASIORequires Test Mode or Disabling Driver Signature Verification on x64 OS for:Notes
Win10UNi Xonar W10 1825 v1.81a r21825 / 22-Jun-20162.0.0.12STXII, HDAV, Xense, Razer AC-1Latest Win10. Might have more problems than previous releases.
UNi Xonar 1816/1823 v1.80a r31823 / 0‎2-‎Jun-20152.0.0.12STXII, HDAV, Xense, Razer AC-1Latest Win8.1, Win7, Win Vista. Might be more stable than v1.81a for Win10.
UNi Xonar STXII 11.5 v1.80b r3STXII 11.5 / 18-Feb-20142.0.0.14All cards except STXIILatest STXII signed driver. Fork from standard audio drivers (eg. 1822). Might have more fixes than standard drivers.
UNi Xonar 1816/1822 v1.75a r31822 / 11-Dec-‎20132.0.0.12STXII, HDAV, Xense, Razer AC-1Overall it might be more stable than v1.80a and v1.81a drivers.
UNi Xonar STXII 11.5 v1.75b r3STXII 11.5 / 18-Feb-20142.0.0.13All cards except STXIIFork from standard audio drivers (eg. 1822). Might have more fixes than standard drivers.
UNi Xonar 1816/1821 v1.711821 / 11-Apr-‎20132.0.0.12HDAV, Xense, Razer AC-1Win 10: might solve the BSOD’s after system wakeup from sleep. More info here.
UNi Xonar 1814/1818 v1.701818 / 17-‎Dec-‎20122.0.0.12HDAV, Xense, Razer AC-1
UNi Xonar 1814/1815 v1.64 r31815 / 03-‎Oct-‎20122.0.0.12STXII, HDAV, Xense, Razer AC-1Might offer better positioning in multichannel setups like 5.1 or 7.1 (info)
WinXPUNi Xonar STXII 11.5 v1.80b r3STXII 11.5 / 18-Feb-20142.0.0.14 –Latest Win XP. Fork from standard audio drivers (eg. 1822). Might have more fixes than standard drivers.
UNi Xonar 1816/1823 v1.80a r31816 / 11-‎Apr-‎20132.0.0.12 –Latest Win XP standard audio drivers.
UNi Xonar 1814/1815 v1.64 r31814 / 03-‎Oct-‎20122.0.0.12 –Might offer better positioning in multichannel setups like 5.1 or 7.1 (info)

Official addons (documentation):

  1. 1777 drivers + Asio 1.0. 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 or enhancing audio: 

1. Standalone apps pack / Mirror. Based on a script made by Virus. Before running the files, close any audio source/application. Legacy, preferably use XonarSwitch and configure it with separate profiles.  Does not work correctly when used with STXII (“b”) drivers. 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.

2. Additional tweaks

  1. Disable SpeakerCompensation tweak
  2. Increase microphone volume by 3 dB tweak

3. Xonar related applications:

    1. XonarSwitch (beta) – Alternative panel to Asus Audio Center and C-Media Panel. Allows you to control various Xonar’s audio settings, define them as switchable profiles and apply them on-the-fly without having to stop the audio playback. By Giulio.
    2. Front Panel switch (new version) / Mirror. Release notes. By Virus.
    3. Driver re-starter for sound loop problem for Win Vista/7/8/10. By Razord93.
    4. Xonar-EQ – Control Xonar equalizer settings from your Android phone or tablet. By Sascha.
    5. UNi Xonar driver cleaner v1.01 – Standalone driver cleaner based on the one that’s included in UNi Xonar drivers.

4. Auxiliary audio applications:

    1. ASIOConfig by djdecks – ASIO configuration viewer/changer that can be used when you can’t access the Xonar ASIO Configuration directly.
    2. SoundLock – Set the maximum output volume that sounds can be at. Can replace Xonar SVN in some cases (like limiting the volume of loud noises in movies). Works on Windows Vista and newer.
    3. SoundVolumeView – Alternative to Windows Volume Mixer. Allows a finer tune of applications volume levels and offers the ability to save them as different profiles. Works on Windows Vista and newer.
    4. Equalizer APO – A parametric/graphic system-wide equalizer. Works on Windows Vista and newer.
    5. ASIO4ALL – Universal ASIO driver. Can be used instead of the ASIO driver included that’s included in Xonar drivers.
    6. MicMute – Mute microphone with a keyboard shortcut or make it work with a push-to-talk key for any application.



  1. Serhat    05 Mar 2017 @ 11:23   

    I own a STX II and for me the original drivers sound better. I have also noticed that ASIO version of unified drivers are older than the original drivers’.


  2. Robert Medley    08 Mar 2017 @ 01:13   

    Wow I have actually had this Xonar soundcard for over a year probably a year and a half. The sound card has always been decent but it would always seem to develop this buzz/feedback after a while. I would change out the drivers and it would primarily go away and or get better but never completely. When I am listening I can’t really hear it and or the sound defeats the feedback. I had gotten back around until it is always having the buzz again and I went looking for drivers to see if there was anything new and walla I found your drivers and they fixed the whole problem.

    Thank you it is really appreciated. Just as a note I am partially deaf (legally I am deaf but I can hear 40% out of one ear and the other ear picks up the sub and mid/ranges-bass) so highend headphones are a must and I use some Masters and Dynamic cans. The help is very appreciated.


    • CarvedInside    08 Mar 2017 @ 02:09   

      Thanks for the feedback. I’m pleased to hear that these drivers helped with the problem you’ve been having.
      If you can tell me what Xonar card do you have, the original driver version you had previously installed, your OS, what UNi Xonar driver you have currently installed and what panel configuration have you selected when you’ve installed them?


  3. Momi    08 Mar 2017 @ 19:11   

    Hey! Just a quick feedback on the new audio driver:
    I’m using the STX II, running the latest v1.81a rev.2 (low DPC) drivers on Win 10 64-bit.
    Yesterday i ran into an issue: Suddenly, the left canal did not make any sound anymore, neither on the headphone-out nor the regular cinch-out’s. Balance options were ok. However, when turning up the volume to 100 % (and only 100 %), the left canal kicked back in.
    The only thing i changed on the system was installing Titanfall 2 via Origin, so that might have something to do with it.

    Reinstalling the v1.81a rev.2 driver, following the correct uninstalling (play audio file) and installing (test mode or signature control deactivated) procedure completely solved the problem.

    Nevertheless, thank you very much for making the UNi drivers!


    • CarvedInside    09 Mar 2017 @ 21:19   

      Hi. Before you’ve tried to reinstall the drivers, have you tried to restart the system?
      Thank you for the feedback.


      • Momi    09 Mar 2017 @ 22:05   

        Yes, first i’ve tried to just logoff-login and then i’ve restarted the system twice – nothing but reinstalling helped in my case. I will report if this issue occurs again.


  4. Demian Martin    11 Mar 2017 @ 07:40   

    I just installed for both Win 10 and XP for a Xonar DX. The card works fine in ASIO but in WDM I can’t get playback working correctly above 48 KHz sample rate. Record works well. Simple test is using ARTA in loopback and set the sample rate to 192KHz. Set the generator to 60 KHz and typically something around 16 KHz comes out. In ASIO 60 KHz comes out. it seems to record correctly at 192, just playback. Sam issue in XP and Win 10. an ESI [email protected] in the same system works correctly. Something in the driver is causing resampling on playback.


    • CarvedInside    13 Mar 2017 @ 22:38   

      I wasn’t aware of this problem. Unfortunately, there is little chance I could do something about it. Probably C-Media (if informed by ASUS) could fix this.
      Thanks for reporting.


  5. jovigom    11 Mar 2017 @ 13:13   

    Hello, good morning!

    Thanks for drivers.
    I have a question. Is it normal I cannot adjust EQ with optical connection?


  6. Lindsay Addie    12 Mar 2017 @ 03:11   

    First thanks to CarvedInside for continuing to produce new drivers for us all to use. A couple of days ago I installed the 1825 2 1.81a rev2 drivers on Windows 10 PC with a Xonar STX Essence. As other have already the sound footprint with these drivers is definitely different. I listen exclusively to classical music and find that stereo positioning is more precise and the bass seems slightly deeper with these drivers.


  7. petr    13 Mar 2017 @ 22:57   

    Installed the last driver on the Xonar DG after a pause and playback it gives a reverse


  8. Michael    15 Mar 2017 @ 00:31   

    I am not 100% able to pin down the cause yet, but I have the feeling that the 1.81 drivers have introduced DPC latency issues, and the do seem to sound different to me too. I am not using any control panel, just XonarSwitch. I am using a Xonar D2X and Windows 10 with the latest patches applied as of this time. I have been using your drivers for years man, thanks for the offer to the community.

    I actually installed the 1.80a -r3. The difference in DPC latency is quite massive, with exactly the same settings through XonarSwitch. The driver highest reported dpc latency via LatencyMon went from 800-900ns with 1825, to 260ns with 1823.
    With the 1825 driver, whenever I pressed the “start monitoring” button in LatencyMon while music was playing, the whole system would freeze with a repeat sound for half a second, and then start monitoring. I would also eventually get the report that my system isn’t capable of realtime video/audio tasks. That’s with everything equal except the difference in drivers. The older driver (1823, 1.80a-r3) behaves properly, the new one seems to be hogging my system completely. I even tried to switch systemplarform clock with it, and it was doing the same.


    • CarvedInside    15 Mar 2017 @ 00:43   

      First, I want to give you some advices regarding the use of the comment section:
      1. You’ve replied to a discussion thread that wasn’t about the problem you are reporting. If you are bringing a new issue then write a new comment instead.
      2. You’ve added your e-mail in the website field. The website field is visible for the public and bot crawlers. I’ve removed that information from your existing comment but you should remove the address from the Website comment field for future comments.

      Regarding the DPC latency issue. Thanks for reporting. I will look into it to see if I get the similar behavior.


      • Michael    15 Mar 2017 @ 02:09   

        Thanks for tidying up my posts! The difference was quite massive, I can write down my specs if you want them:
        CPU Intel Core i7 [email protected] (overclocked via Turbo multiplier, HT enabled, and with frequency scaling enabled)
        Sapphire P67 Hydra (with the last available Sandy Bridge bios, 32 PCI clocks set, all usb handoffs to “enabled”, and the last AHCI Intel storage driver for my platform installed)
        Radeon 7970 oc with boost (bios modded to a 280x with the 17.3.1 AMD driver installed)
        Xonar D2X
        Windows 10 Pro x64 14393.953

        I first noticed something was off when I tried moving the Groove Music window while music was playing and I was adjusting EQ settings for my headphones. The window movement was jerky and the music would glitch out for a second. Then I realized that I have had high-DPC related issues with my system since installing 1825, and then I verify that DPC latency was indeed crazy, using LatencyMon. You have to use the system a bit, in order to verify it, but one of the sure tells is that pressing the “Start monitoring” button in LatencyMon will glitch any music playing and pause the whole system for a while and then DPC latency will start going insane as you use.

        I’m 99% certain that it was responsible for at least two complete freezes in my computer.


        • kean3D    16 Mar 2017 @ 21:08   

          i got same dpc latency problems months ago, and the cause was the antivirus (avast); uninstalled it and problem solved; strange cause before change platform (cpu+mobo) i used same antivirus/os/audio card with no problem at all


          • Michael    20 Mar 2017 @ 21:18   

            I am not using a resident av, and the only difference was the driver in my system.


        • Shrymp    18 Mar 2017 @ 14:26   

          I have the exactly same behaviour on my machine as Michael. i7 [email protected] GHz. Latency was lower with former driver, stalling with some music programs or simply playing music via MPC HC or WMP was not a problem. Tested with exactly same system settings in various games & programs. Nevertheless the driver itself is good.


          • Michael    20 Mar 2017 @ 21:19   

            How do you mean “the driver itself is good”? DPC latency is quite detrimental here. You do have a more powerful CPU, but you’re keeping the new driver? My guess is that you have HPET enabled?


            • Shrymp    24 Mar 2017 @ 17:43   

              Everything else than the DPC latency is good, meaning all the work Carved put into it. And yes, I keep the driver because it does what it should and beside the higher latency (which still is low enough that LatencyMon says it’s ok without any dropouts) I don’t have any complaints. I’m into music and work often with Buzz and loads of VST’s but don’t have problems. Only a few higher numbers as before don not create a problem as such (for me). But technically spoken: this driver HAS a higher DPC latency than the one before and it stutters the system if you start playing a file with Mediaplayer etc. I think one has to balance if it’s a problem (use older driver) or just something uncomfortable because DPC latency values are higher.
              Oh, and just to mention – the impact of HPET is overvalued nowadays (imho). 😉


              • Zsolt    25 Mar 2017 @ 17:19   

                Does this mean that the DPC issues are back, or you never had them?
                I had clicking and high latency since day one on windows 10. After I got fed up with it I downgraded to 8.1


                • Shrymp    26 Mar 2017 @ 13:21   

                  @Zsolt: The DPC issues are permanent. Where “issue” only means higher DPC latency values and stuttering when starting Mediaplayer or such (on my system). It is insignificant with “daily work”, so to say.


    • Devorra    03 Apr 2017 @ 21:51   

      Hi, i have the same problems with the driver “UNi-Xonar-W10-1825-v1.81a-r2”
      The Latency is very high. Since i upgrade to RX480 i have also Stuttering on my PC. I think the driver can be responsible for this.
      Sorry for my english, but you need more confirmations. 🙂


  9. Alex    17 Mar 2017 @ 12:19   

    I use win 10, asus Xonar DS. I have crashes in Skype when PC is turning off.

    Install your driver (UNi-Xonar-W10-1825-v1.81a-r2): Normal – Asus Xonar Audio Center – don’t fix my problem. All other options have fixed the Skype crashes.
    But in front panel i have the headphones, and can’t change the stream from back panel to my headphone. (in Normal – asus xonar audio center, i can do this.)
    Please, help.


  10. Mike Ch    20 Mar 2017 @ 03:36   

    Thanks for all the support for so many years!
    I found out about uni xonar drivers after making the switch to win10 and searching online. I have owned the Essence ST pci since Sept 2010, no issues since until win10. I experienced the random 6kHz screech while using headphones via the headphone port of the card. Thought it was fluke until it occurred again. Thought it might’ve been driver issue, so I stopped using the headphone port and only used the L/R rca with an adapter for 3.5mm port. Few months later, I tried the headphone port again, fine for few weeks, then bam, the 6kHz surprise… Again I returned to using the L/R rca’s, even got an amp for passive speaker which also had it’s own headphone amp. So I used that for few months, until yesterday the 6kHz happened… I was comfortable, was not expecting the screech to affect rca ports of the card… It’s sad such a quality and well-regarded product is flawed.
    For my uses, I am settled on using a cheap usb sound adapter. On the plus side, the adapter has a dedicated mic port so it’s very clear sound recorded with modmic, according to friends on discord.
    I really enjoyed using the uni xonar drivers, as I didn’t want to part with my essence card at the time. Thanks for your time, I really appreciate the work!


  11. John    24 Mar 2017 @ 22:14   

    Hi, I noticed when not using the original xonar audio center, and installing the dolby software, the sound was much worse on my DSX. But with the original software that comes with the Asus drivers, the sound is ok.

    Just out of interest, what are the differences between the original asus xonar drivers and the unified drivers?


    • CarvedInside    24 Mar 2017 @ 22:32   

      Hi. I moved the comment to it’s own discussion thread as it contains topics unrelated to the discussion you replied too.
      If you’ve installed v1.81 drivers then those specific drivers might have a different sound quality. Try previous releases or try the version that has the same audio drivers as ASUS original drivers that you previously had.
      Another factor that could change the sound quality is the fact that you’ve installed the Dolby software. You should try the drivers as they are and then install them with additional software/modifications.

      For the differences between UNi and ASUS drivers you can check the UNi Xonar Features page.


  12. Arnold Schwarzenigger    26 Mar 2017 @ 04:07   

    There is still problem with W10 + Firefox + Youtube. Sometimes very high sound on playback. But with latest drivers(v1.81a) and newest FF the problem is very very rare. Is much better than before. No problem on CIA spyware AKA Chrome.


    • CarvedInside    28 Mar 2017 @ 19:17   

      Thanks for the feedback. Can you tell me which card do you have, if you use front panel jack and if you have set a specific headphone gain.


      • Arnold Schwarzeneger    05 Apr 2017 @ 01:03   

        ST, headphones connected directly to the card and normal gain, but currently i use speakers.


        • billgates    16 Jun 2017 @ 15:49   

          You can switch you card to different PCI slot. Several month from switching (xonar st) I have no that 6khz sound. Before I have it from 1 time per week to several times per day.


  13. Simon Wirths    26 Mar 2017 @ 19:21   

    Hi maxedtech Team,
    First and foremost, thanks for these amazing drivers. Secondly, my question: How to set a special use case up for which I could not find any tips on the site.

    I want to use the Frontpanel Out and the Headphone Out of my Xonard DG simultanesously, so that audio is streamed to both ports. In the Xonar Setting only one can be chosen at a time. Is there maybe a registry setting or a part in the application code that I can tweak to achieve that? Not afraid of long code files, so hit me :).

    Thanks in advance and in hope for a quick response,



    • CarvedInside    26 Mar 2017 @ 21:30   

      I don’t think something like this is possible.
      There is a trick that works if you have 2.0 or 2.1 speakers, you can clone the output from the front speakers output jack to another output jack (rear or center speakers) where you could connect your headphones. Guide for WIN7/8/10:
      1) Enable stereo upmix if you’ve installed the drivers without it.
      2) In the panel set the following: 2 channels and 4 speakers.
      3) Don’t enable Dolby enhancements (like Dolby Pro-logic).
      If you have Windows XP then there is a different guide for that.


  14. Karmak    31 Mar 2017 @ 12:15   

    Anyone knows why Asus Audio center is not working? DO I have to install it from the original Asus website BEFORE installing the UNI drivers? atm it just won’t launch. Thank you


    • CarvedInside    01 Apr 2017 @ 01:00   

      Asus drivers are not required for Asus Audio Center. By any chance, have you installed the UNi Xonar drivers with Low DPC Latency configuration? Because with Low DPC Latency configuration you have access to Asus Audio Center but it does not autostart with Windows.
      Do you have Asus Audio Center entry in Start->All Programs->UNi Xonar Audio or C:\Program Files\UNi Xonar Audio\Customapp\AsusAudioCenter.exe? If you launch it, does it work?


      • Karmak    01 Apr 2017 @ 14:39   

        I don’t think I used low dpc, I first installed c-media without gx, and tried with normal later. In both cases I did have asus audio center in Start and in the program files folder but won’t launch if I double click the executable


  15. bizuka    02 Apr 2017 @ 01:58   

    can you guys please tell me what is the driver with lowest input lag for an essence stxii?
    for windows 7 and for windows 10. thank you.



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