UNi Xonar Drivers 1.81 (post periodically updated)

UNi Xonar drivers are Windows drivers for the following sound cards:

  • ASUS Xonar DG, Xonar DGX, Xonar DG SI, Xonar DS, Xonar DSX, Xonar D1, Xonar D2, Xonar DX, Xonar D2X, Xonar HDAV, Xonar HDAV Slim, Xonar Essence ST, Xonar Essence STX, Xonar Essence STX II, Xonar Xense.

  • Other C-Media CMI8786, CMI8787 and CMI8788 audio chip based cards: Auzentech X-Meridian & X-Meridian 2G; HT Omega Claro, Claro Plus, Claro II, Claro Halo, eClaro; Razer Barracuda AC-1; AIM Audio SC8000. View full list.

Supported OS: Windows XP, Windows Vista, Windows 7, Windows 8, Windows 8.1, Windows 10, Windows Server 2003, Windows Server 2008, Windows Server 2012 and Windows Server 2016.

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

Linked content:

  1. Introduction

  2. UNi Xonar Features

  3. FAQ & troubleshooting guide (upd 26 Sep 2017)

  4. Having problems installing UNi Xonar drivers? Refer to this topic

  5. Useful tips & suggestions | Known issues & workarounds (upd 22 Mar 2016)

  6. Xonar best audio settings guide

  7. UNi Xonar installer addon documentation

  8. Poll: Rate ASUS Xonar driver support


  1. Release notes

  2. Windows 10 compatibility


Page updates and announcements:

Previous post updates

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/C-Media work, you do it for the work that I have done and the support I’m providing.

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 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.

Previous release notes:

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 “STX II”

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 1.71.1

Replacement for v1.71 driver package with configuration fixes and updated components.

UNi Xonar Installer changes:

  • Updated UNi Xonar Installer with that from v1.80a.

Driver changes:

  • Updated driver installer, ASUS Audio Center and C-Media Panel with those from v1.80a.
  • Added theoretical support for STX II cards.
  • Fixed GX not being turned off by default in “Normal” configuration for Xonar D2, D2X, DG, DGX and DG SI cards.

Known issues:

  • 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  “S/PDIF Pass-through Device (Asus Xonar…)” from Control panel->Sound. It’s confirmed that the audio drivers included in v1.70 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 1.71

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)
  • GX is not being turned off by default in Normal configuration for the following cards Xonar D2, D2X, DG, DGX, DG SI.
  • 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  “S/PDIF Pass-through Device (Asus Xonar…)” from Control panel->Sound. It’s confirmed that the audio drivers included in v1.70 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 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.

Complete Previous Release Notes

Notes about Windows 10 compatibility (updated 13 May 2018)

UNi Xonar drivers v1.64 and above will work with 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.

> Find out which Windows version you have installed.

Windows 10 (multiple versions) possible issues and fixes:
  • Microphone not working – Check this guide. (thanks Shane)
  • Audio crashes – If you have “Dolby Atmos for Headphone” app installed you should remove it and replace it with the updated “Dolby Access” app in order to avoid audiosvr process stack overflow errors that are crashing the audio subsystem. (thanks Chris Leipold)
  • Popping and cracking sounds – If you have a AMD graphics card, try disabling AMD High Definition Audio Device from Device Manager. Possible to try the same steps for Nvidia HD Audio Device for Nvidia cards. (thanks Marc)
  • BSOD’s after system wakeup from sleep – Try UNi Xonar v1.71.1 driver. (thanks Kalle)
Windows 10 version 1809 (October 2018 Update) notes

Before upgrading to 1809, you should uninstall the UNi Xonar drivers especially if you have v1.81a installed, as the update process might result in BSOD (#1). As a reminder, in order to avoid a system crash while uninstalling 1825 (v1.81a) drivers you will need to play an audio file before proceeding with the uninstall process. Restart the system after the uninstall process is done.

Possible issues reported so far:

  • Crashes at boot or after walking PC from sleep or hibernation (#1)
  • Audio stops working after some time (#1)
  • Inability to change the number of audio channels to other than 2 channels when using S/PDIF output if you have Speakers disabled in Windows Sound -> Playback (#1).
Windows 10 version 1803 (April 2018 Update) notes (updated 13 May 2018)

Our community member Chris Leipold reports that the wake up from sleep BSOD, settings reset and not working audio server process at startup issues that where introduced with Fall Creators Update are fixed with Red Stone 4 preview (pre 1803 release).

Possible issues and fixes:

  • Microphone not working – Check this guide. (thanks Shane)
  • Audio crashes – If you have “Dolby Atmos for Headphone” app installed you should remove it and replace it with the updated “Dolby Access” app in order to avoid audiosvr process stack overflow errors that are crashing the audio subsystem. (thanks Chris Leipold)

Possible issues reported so far:

  • Settings (Bit-depth, sample rate, number of channels) reset bug when clicking the volume after restart might still happen (#1)
  • Windows might freeze when installing Xonar drivers (#1)
  • Microphone might not work even after doing the microsoft privacy toggle fix (#1)
  • S/DPIF output might not work at least for some with Xonar DG cards (#1)
Windows 10 version 1709 (Fall Creators Update) notes (updated 13 May 2018)

Reported issues so far:

  • Drivers above 1821 v1.71 may cause BSOD when waking system from sleep (#1, #2, #3). It’s unclear if it is a driver issue or a Windows issue that’s triggered in specific conditions that are met when using drivers above 1821 v1.71. Since ASUS/C-media driver support is pretty much dead and most people didn’t have this issue until Windows 10 Fall Creators Update, people having this issue should contact Microsoft support and submit their crash dumps.
  • Card settings are being restored after each restart. A temporarily workaround would be to save your settings as a XonarSwitch profile and apply it each reboot. Anyone affected should report the issue to Microsoft. Update 6 Feb 2018: it looks like this is fixed in insider builds >= 17074, and it will be fixed in Windows 10 version 1803. Update 8 Mar 2018: this should be fixed with KB4074588 update for version 1709.
  • Default format (bit-depth and sample rate) from Windows Volume->Playback devices and the number of audio channels resets each time the Windows Volume icon is clicked (#1, #2). Anyone affected should report the issue to Microsoft. Update 8 Mar 2018: this should be fixed with KB4074588 update. Update 13 May 2018: This issue might still happen even after installing KB4074588 (#1).
  • Possible high frequency tone when playing audio.

Previous Windows 10 notes


Driver Downloads (Windows only) – click here if downloads are not showing

Standalone applications for changing settings or enhancing audio: 

1. Standalone apps pack. 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.
  2. Front Panel switch (new version) – Application that seamlessly changes between rear speakers and front panel speakers output.
  3. UNi Xonar driver cleaner – Standalone driver cleaner based on the one that’s included in UNi Xonar drivers.
  4. Xonar Restoree Extended – Tool to restore Xonar cards hardware ID. The extended version includes support for Xonar STX II and Xonar DG SI cards.
  5. Xonar Driver Restart – Application that will restart the Windows Audio Service and C-media audio driver. Useful for sound loops, no audio output and other issues.
  6. Xonar-EQ – Control Xonar equalizer settings from your Android phone or tablet. By Sascha.

4. Auxiliary audio applications:

  • ASIOConfig – ASIO configuration viewer/changer that can be used when you can’t access the Xonar ASIO Configuration directly. By djdecks.
  • 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.
  • more…


  1. Michael03 Feb 2019 @ 19:20

    I recently ugraded my old Windows 7 system to a Ryzen-based x470 system running Windows 10 (latest version).

    Everything seems to run perfectly fine, however, I noticed that when changing to a different output the internal relay actually clicks 3 times in a row.
    With my former system it was just one click.

    Just wanted to make sure this is standard behaviour now with UniXonar. Tested the latest version aswell as 1.71. Same behaviour.

    But thanks a lot for still supporting this card. I would have a hard time finding an alternative soundcard.


    • CarvedInside03 Feb 2019 @ 20:00

      Please clarify what exactly are you changing and from what to what. Which Xonar card do you have? Which motherboard do you have?
      I wouldn’t say 3 internal relay clicks are normal. I will have to check how it behaves for me.
      The relay click behavior could have changed if you’re using different drivers than previously, because of some issue within Windows 10 or the Ryzen platform.


      • Michael03 Feb 2019 @ 20:26

        I’m using a Xonar Essence STX running on an Asus X470 Prime. So, no victim of the incompatibility between Ryzen & STX II here.
        When changing the ouput, it’s like 2 fast clicks, then about 400ms pause followed by the third click. And it happens every time, no matter if I change to speakers or headphone.

        . .. and if it helps: The card is seated in a PCIx1 slot with it’s own dedicated power cable running to a BeQuiet Dark Power Pro 550W power supply.
        Installed the latest version, followed by an uninstall and then 1.71 again. Same behaviour. Onboard sound is disabled in BIOS.


        • CarvedInside03 Feb 2019 @ 21:00

          Your comment above was written as a new comment instead of a reply to the discussion and I moved it. When replying to an existing discussion use the “Reply” button floating on the right of the comment you are replying to.

          Which panel are you using to change the output? The speakers are set to multiple channels/speakers?


          • Michael03 Feb 2019 @ 21:53

            I tried both panels. Speakers are set to 2 channel stereo.

            As long it’s working well, I don’t really care. But I’m curious how many clicks other users with an Essence STX get 🙂


            • Michael03 Feb 2019 @ 23:05

              Just installed ‘UNi Xonar 1814/1815 v1.64 r3’ and there are just two clicks, like it used to be on Windows 7.

              As long as there aren’t any negative side effects and no bugs which are fixed in later versions, I consider this one as a keeper!


              • CarvedInside04 Feb 2019 @ 16:59

                Which driver version did you had installed when you where on Windows 7?
                I have tested with my system Intel Core 2 Duo platform, Windows 10 1809, Xonar DX, tested with both UNi Xonar v1.71.1 and v1.81a and I only get 1 click.
                STX cards might behave differently, we would only know if someone else with a STX card would report back.


                • Michael06 Feb 2019 @ 00:43

                  I used the offical driver. 2 clicks and worked perfectly, so no reason to update.

                  I tried the official Asus driver for Windows 10. Apart from not working (no sound at all), I got 3 clicks aswell here. So the driver changed the click behaviour somewhere. So it looks like all UniXonar drivers > 1.71 are adding an additonal click when changing relays.


  2. Moravid03 Feb 2019 @ 21:35

    After updating to 1809 my STX II on latest W10 drivers BSOD whenever I used the standalone apps to switch rate or gain, earlier version refused to install and system freezes.googling BSOD stop code “DRIVER IRQL NOT LESS….” cmudaxp.sys shows issues with cmedia controller so I resetted BIOS then disabled the integrated sound as well as AMD HDMI sound under device manager and restarted making sure integrated sound is once again disabled in BIOS. Happy to report standalone apps now work without issue!


  3. David04 Feb 2019 @ 16:50

    These drivers somehow conflict with my Realtek wireless network device(s), i found a correlation between random connectivity problems and the ‘cmudaxp.sys’ driver, I am a developer myself and I know how hard it will be to convince you of this relation but I will try to do my best:
    – I’ve been having random loss of network (total drop of bandwidth/total loss, or heavy interference) while the wifi network remains connected, often in IE at those times it will say “INET_E_RESOURCE_NOT_FOUND”.
    – The problem happened more often with 1 of my 2 available wifi networks, so I mostly used the other (i considered more reliable) one. The ‘unreliable’ one is with a repeater.
    – Yesterday, the situation worsened as also my ‘reliable’ network started having these cuts. I decided to reset winsock and perform network resets, like I would usually try.
    I then rebooted and cleaned my temp files both with CCleaner and Wise Cleaner 365, the latter crashed my PC with a BSOD on cmudaxp.sys when it reached a certain cleaning stage. It clearly hit some critical driver temp files.
    My microphone’s hardware toggle button was switched on at this time.

    – I was done with it, so after a few more tries to fix my network (it would cut out every time in just minutes or less) I went to bed and ready to give it a go today.
    – Today, the same problem appeared with my internet connection. I decided to switch network, and when I clicked the “connect” button on another network, I got a BSOD on cmudaxp.sys.
    * Note: this is the most recent minidump I will attach

    The event of that BSOD happening in the very millisecond I tried switching to another network (the first one having loss of internet connectivity..), on the audio driver, made me confirm in my head Xonar drivers were related,
    to the months-long, random, internet problems I had encountered. I also feel that the rate of random connection cuts increased when I started using my microphone, as I have been playing a game requiring this for the past 2 days, I got it more often than normal.

    Ok, so with my internet hampering almost permanently (even with the mic button switched off, so no voice input.. didnt try disconnecting cable though) and my suspicion about the Xonar uni drivers interfering,
    and without success for hours since last night, I uninstalled the audio drivers (using Xonar uni uninstaller/cleaner) and suddenly, my network problems were gone.

    So, now, this also isn’t coincidence, after all these hours a simple uninstall of your driver fixed my network so it would stay connected indefinitely and not seconds to minutes.
    As I said, this solved the raised rate of ‘random’ connection problems I had encountered for months, now making my life almost impossible. I don’t expect the random (less oftenly occuring) drops to return, now that I uninstalled the sound driver, as they were equal in nature.

    The random stability issue has been pestering me for months, and now that I laid these links, I also seem to memorize it all started around the time I first installed Uni Xonar drivers.
    I started assuming something in my OS was messed up and that some day I’d need a re-install to make sure, because the routers behind both networks had a very solid DSL line and throughput even when it occured.

    Now, I feel the unlikely event of the sound card (when running these drivers) interfering with my network devices, is true (chipsets: Realtek 8812BU, 8188GU, RT3572 – tried multiple to solve it, even most recent one).
    I am delighted that I finally found the problem, I can miss these network interruptions like toothpain, but I want to report this issue so that you may investigate or fix it if confirmed.

    I uploaded my minidumps here:

    The BSODs may be a side effect of the root problem, but can help you narrow down where to look for specifically.

    Side notes (unlikely to have played a role):
    – I touched and may have adjusted the sound card a few days ago, around the onset of the more heavy problems (when I also increased my use of microphone as explained earlier), by reaching the mainboard battery underneath I had to bend it over a bit.
    – There has always been a slight current spanned over my computer’s case; you can feel it being under weak power with a finger. The source is unknown, it could be my PSU.

    The first is unlikely to play a role because I memorize increased network problems whenever I started to increase my mic usage in the past. But never such an increase as rendering my network so crippled like it did last night.
    The second is unlikely to play a role because I memorize the network problems started around the time I started using Uni Xonar drivers.

    I don’t think either have created a predisposition, but I just want to be 100% transparent so you can investigate it properly.
    Also to note that I am a very advanced user (working in IT but haven’t lost touch with the basics while at uni) so I am 100% certain that my OS is in top shape, I am not the type of user that will nuke their Windows.
    Unlike many others, I don’t need to re-install Windows every now and then because of slowing/nuking/dooming/infecting it.

    I just mean, that if a symptom of something (software) occurs on my PC, I can be sure it’s the fault of that software, and often tell support desks I cannot be Tier-1’d or helped with troubleshooting. I always turn out to be right that it’s not a problem on my side.

    I hope this detailed issue report helps. Interference of an sound card (due to drivers) with Wifi equipment sounds unlikely, but as you can see I got factors pointing in that direction. Also please note that I re-installed Uni Xonar drivers (after complete clean-ups) several times, for unrelated reasons in the months I ran it, and I always experienced the described network issues during that time.


    • CarvedInside13 Feb 2019 @ 20:59

      First, I want to clarify some things. These are modded drivers and if the problem was indeed from the Xonar driver, I would not be able to fix it as I do not have the access to the source code. Another thing is that the problem is not specific to UNi Xonar drivers, if you would install ASUS original drivers with the same audio drivers(1816, 1818, 1823, etc.) as the UNi Xonar drivers you would have the same issue.

      Things you could try:
      1. Try different Xonar driver versions and install them with “Low DPC Latency” configuration. Try especially with v1.71.1. Do not run ASUS Audio Center to change the settings, use C-Media Panel or XonarSwitch instead.
      2. Try different Realtek wireless driver versions.
      3. Check if the Realtek wireless card shares the same IRQ with the Xonar card. If it does, you could change the interrupt mode to MSI mode for the Realtek wireless card with MSI Utility. Do not change the Xonar card to MSI mode as it will not work and Windows will crash at boot.

      There is the possibility that there are 2 problems going on. The BSOD problem or some of the BSOD being caused by something else. The BSOD could also be from:
      1. System memory errors, check with Memtest86+ or Windows Memory Diagnostics.
      2. The security suite you are using might interfere with the drivers or memory allocation, try running with it uninstalled.
      3. Xonar card has a hardware malfunction. If you can, try the Xonar card in another PC.

      Let me know if any of those helped.


  4. Alex06 Feb 2019 @ 14:53

    Hello, I have the Asus Xonar D2X and i’m trying to get Sound working on Windows 10 Pro 1803.
    It doesn’t matter what driver (Asus or UNI Xonar), or what GUI I use, I get only 2.0 sound (left speaker and right speaker).
    But let’s start from the beginning:
    The computer was running with this soundcard on WinXP for years without problems.
    Well, I wanted to change to SSD… so Win10 makes sense. For the soundcard there are even win10 drivers available from asus by now, but in beta state.
    So i installed that Asus Driver, did the 5.1 Setup (In the Asus Utility and in Win10 Sound settings) and everything was fine.
    When i click on a speaker, in speaker setup, i get a sound signal, from each of the 5.1 speakers.
    But when i start to play an audio file, Youtube or a simple Windows sound i get only 2.0 Sound (front left and front right).
    With the UNI Xonar driver i have exactly the same problem, I tested UNi Xonar 1816/1823 v1.80a r3 and UNi Xonar W10 1825 v1.81a r2 , tried all options and all GUI’s, always erasing the old Driver files.
    I also tried to setup as 7.1 System and excluded the ‘side speakers’ to make it 5.1 again, i read that somewhere as workarround, but didn’t solve the problem.

    I read on several sites that the D2X is working with this Driver on Win10 with 5.1 Speakers…
    I don’t know what to do now. I think i’ve tested all possible settings. But maybe someone can help me here 🙂


    • CarvedInside08 Feb 2019 @ 02:14

      FYI the content in YouTube is 2.0 (stereo), there is no 5.1 audio content.
      Basically, you want the stereo content be played to 5.1 speakers, this is called stereo upmixing to 5.1.
      On Windows XP, the original Xonar drivers did have stereo upmix enabled by default. Check the FAQ Q&A 4 for how to enable stereo upmix on Windows 10.


      • Alex09 Feb 2019 @ 16:16

        Thank you, the sound is now perfect. It’s a bit uncomfortable for me that the solution was so simple and so close. But i’m glad that it solved the problem now. Good work 🙂


  5. Farewell07 Feb 2019 @ 00:09

    dont know if someone can help me with my problem but i post it anyways

    I use a Xonar HDAV 1.3 have it looped with my vga card via hdmi, then to my reciever then my TV
    now the problem is that when i turn my TV off for a while and then back on, it seems that the Xonar HDAV wont
    pickup the signal again and i get black screen

    what i did was check if my video card was the problem but when i connected directly to my VGA card there was signal again

    anyone have any ideas about what can cause it?

    Friendly Regards


  6. Mauricio08 Feb 2019 @ 09:47

    Hi. I installed the 1823 – v1.80a with Driver enforcement mode, but now i’m in Test Mode even if I not installed in that way. When I try to /testsigning off it just don’t work, and I really need to stay without Test mode for Battleye anticheat and some stuff like that. What can I do?



    • CarvedInside08 Feb 2019 @ 18:01

      Hi. Do you have the Test Mode watermark on desktop?
      Have you followed the instructions from here with running the “disable testmode.bat” file with “Run as administrator”? If that does not work, try removing the drivers that you installed with “Disable driver signature enforcement”. If the Test Mode is disabled after that, install drivers that have a valid signature for your card.
      Let me know how it goes.


  7. Mintrel12 Feb 2019 @ 22:03

    Windows 10 1809 *clean install*, using UNi Xonar W10 1825 v1.81a r2.
    I got a BSOD when waking computer from sleep (after 1 hour of sleeping).
    0x000000d1 DRIVER_IRQL_NOT_LESS_OR_EQUAL cmudaxp.sys

    Note: It doesn’t always happen, but the same driver never gave me a BSOD when I was on windows 10 1803 in the same computer.
    Any suggestions to fix this?

    LE: I forgot to say that I’m using Windows 10 Pro x64 version build 1809


  8. Scaffold13 Feb 2019 @ 20:17

    Hello! I’m using Win 10 1803 with Xonar Essense STX II and UNi Xonar W10 1825 v1.81a r2 installed. I cannot change to headphones from the speakers using the Xonar Audio Center – regardless of the setting it continues to sound through the speakers. Has anything like this been reported before?


    • CarvedInside13 Feb 2019 @ 20:53

      Are you switching to front panel headphones or headphones (rear of the card). I suggest you try switching with XonarSwitch and see if it works.
      This might be an issue with 1.81a or with all “a” drivers. Before switching to 1.80b, you may want to try with 1.80a.
      With 1.80a drivers and STX II cards, for Asus Audio Center to work you need to download this patched version and copy paste it over “C:\Program Files\UNi Xonar Audio\Customapp\”.

      Let me know of the results.


      • Scaffold13 Feb 2019 @ 20:59

        Thanks for the response! What is XonarSwitch? I somehow don’t know it.
        Regarding your question – yes, I’m switching to the rear panel headphones as I always used to do with my old STX.

        Just tried overwriting the file with your version and it still does not switch over to headphones.

        An Update. I figured out what is XonarSwitch, and installed it. But it reports the following: “A Xonar HDAV 1.3 has been detected, but the card model is currently not supported by XonarSwitch”.


        • Scaffold13 Feb 2019 @ 21:49

          I just realized that you’re suggesting switching over to 1.80a or 1.80b? Well, I didn’t try this yet. Probably that’s why XonarSwitch isn’t working. I will try these versions, but a bit later.


          • CarvedInside13 Feb 2019 @ 22:36

            For XonarSwitch, I was also interested if it worked with 1.81a drivers. When you have time try XonarSwitch and the patched ASUS Audio Center on v1.80a drivers.
            If switching to headphones still does not work, try with 1.80b drivers.
            Another thing to check, is your card detected as a STX II when you run the UNi Xonar installer?


            • Scaffold16 Feb 2019 @ 11:33

              Curious enough, the card is detected as Xonar HDAV / HDAV Slim.
              When I tried to install 1.80a having manually switched over to STX II, I got a very heavy BSOD.
              After that I tried to instatll 1.80b also having manually switched over to STX II, I got a freeze after the card switch-on click.
              I disabled the network connection and retried installation of 1.80b, this time successfully. But the sound is still not switched over to headphones.
              You think it might be a good idea to try installing drivers for whatever it auto-detects?



Leave a Comment

Your comment may be held for moderation. If it does not show up immediately, please be patient. Comments have to comply with these rules:
  • English language only
  • Don't post insults or threats
  • Try to keep the discussion constructive and informative

We've noticed that you're using an AdBlocker

It's not just you, over 66% of our site's visitors are blocking the ads.

Please disable adblock for this website and refresh this page if you:
find the content useful want to support us creating more content and software want tech support through the comment section

The ads are placed so that there is minimal interference with page reading. There are no pop-up, pop-under or sticky ads.

Alternatively, you can support us by making a donation.