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. August    24 Aug 2016 @ 23:40   

    ASUS Xonar D1, clean Win10 64bit Anniversary installation, UNi Xonar 1816/1823 v1.80a r3 installed without any issues. 24bit/192kHz analog 5.1 speakers working perfectly, as well as front panel headphones (flawless transition using XonarSwitch).


  2. Bahlouda    28 Aug 2016 @ 23:29   

    Asus Xonar D2, Windows 10 Anniversary Update, UNi Xonar 1816/1823 v1.80a r3 installed without any issues. Stereo OK, analog 5.1 not working but Digital 5.1 seems to work. All was working on previous Windows 10.


    • CarvedInside    30 Aug 2016 @ 13:14   

      Thanks for the feedback. When you say “analog 5.1 not working” can you explain what exactly is not working (all speakers, one of the speakers, speakers are mismatched,etc.)?


      • Bahlouda    01 Sep 2016 @ 00:57   

        While (not) messing with Windows configuration (anymore), this is working now. But when it wasn’t working, it was like, some sounds were working (those added to movies) but voices didn’t.


  3. martino cesaratto    30 Aug 2016 @ 21:56   

    asus xonar d2x, windows 10 x64 anniversary update, UNi Xonar v1.75a r2 -> updated to v1.80a r3 but the problem wasn’t solved (did 3 clean installs with disabled signature enforcement). Since the anniversary update, i’m unable to use more than one sound source at a time, meaning that for example, if i play music and i start a game, the game sound won’t work, even if the music is paused. As soon as i close the music player the game sound starts to work again. In the windows mixer the non-played sound shows up correctly, but for some reason it isn’t audible. Also every time i open an application that can play sounds when one is already open, i get few seconds of distorted audio from the already opened one, if that could help finding out the problem.

    LE: After some further testing, the problem is only with foobar2000, if it’s closed i can play youtube and games sound together, also i forgot to mention it all started with the anniversary update


    • martino cesaratto    01 Sep 2016 @ 02:08   

      continuing to test: the audio just doesn’t seem to work with some programs, namely teamspeak, games (project cars, assetto corsa, raceroom), chrome, while it seems to always work with foobar, but when foobar uses it, no other program will play any sound. whatever sound doesn’t get played, shows up in windows mixer. Sometimes the audio won’t work even with foobar closed, but closing and opening all sound-using applications make it work again most of the times. one single time i had to reset because i was getting few secs freezes every time something wanted to play a sound, coupled with distorted sounds played, that time not even foobar or windows test sounds in configuration were working, but everything was still showing up in the mixer


      • CarvedInside    01 Sep 2016 @ 19:08   

        Maybe you’ve switched to ASIO or WASAPI output device in foobar2000 and that is why sounds coming from other applications do not work. Check that and switch to DS (Direct Sound).
        For other problems try 1.75a drivers again.


        • martino cesaratto    01 Sep 2016 @ 21:01   

          Thank you, it fixed the main problem, but i still have some looping sounds issues when opening/closing programs, but they happen rarely


  4. Dylan    31 Aug 2016 @ 01:47   

    Hi there,

    I’ve just bought an 8 inch subwoofer to with my M-Audio 80 speakers. I used an adapter to plug the sub into the “center” channel of the soundcard while the speakers are plugged into the “front” channel. The speakers sound great of course but no sound is coming from the subwoofer. There is no setting for 2.1 sound, and setting the flexbass crossover only affects the speakers. What gives?



    • CarvedInside    02 Sep 2016 @ 09:05   

      Hi. Connecting a subwoofer directly to the soundcard is not a standard 2.1 speaker configuration. In a standard 2.1 speaker configuration you connect the subwoofer to the speakers or amplifier. I’ve come up with a workaround that could make it work.
      Guide for Windows 7/8/10:
      1) Connect subwoofer to Center/Subwoofer output jack
      2) You need to have “Stereo upmix” enabled. Depending on your setup you either have to install drivers installed with “Re-enable stereo upmix to 4, 5.1 & 7.1” option checked or enable it in XonarSwitch.
      3) In the audio panel set the following: 2 channels and 5.1(or 6) speakers.
      4) If subwoofer isn’t sounding right, exchange center/bass channels in the audio panel.
      5) For speakers and subwoofer bass management look at the FlexBass option in the audio panel.
      If you have Windows XP then there is a different guide for that.


      • Dylan    02 Sep 2016 @ 21:58   

        Before I saw your suggestion I set it to 5.1 and the bass starting working. The only difference was the sound became slightly quieter from the speakers. I’m not sure if it’s set up right but it sounds great so that’s good. I installed the XonarSwitch for good measure and played around, and the “Analog upmix via Dolby PLIIx” option didn’t seem to affect much so I’m going to leave it off. Love the drivers!



  5. st0neh    31 Aug 2016 @ 08:57   

    So no matter what I do my Xonar DGX just flat out isn’t detected by Windows 10 AU more than 50% of the time, and if it is detected then it causes the system to hard lock up in use constantly. Windows Audio is pegged at 50% CPU in task manager, I assume because the card has just disappeared from the system (I’ve sat and actually watched it disappear from device manager in Windows. It’s so bad that the lock ups have actually managed to break the filesystem on my Windows 10 partition requiring a complete re-install.

    The card worked perfectly fine in the 1511 build for close to a year, and also works perfectly fine in Windows 7.

    I don’t even know what to say at this point. How do you break an OS so hard?


  6. Mark    01 Sep 2016 @ 15:23   

    Quick question probally been asked before but thought i would ask.

    I have win7 64bit with xonar dg currently running last available drivers from ASUS which version should i download in terms of working/stable


  7. Mr.sprinkles79    01 Sep 2016 @ 23:54   

    Hey people ive got a MAJOR issue going on with my dx. When playing audio at any volume very intermittently.. my system lets out a BLAST of white noise/static at FULL VOLUME.. i run the analog outputs straight to class d power amps.. rated at 300watts per channel.. Its going to give me a heart attack. Now 95% when it does this its from starting Youtube videos. It does it randomly and without any other symptoms(poping static ect). it will blast when i start a video and click the progress bar more than once..or on its own. or not at all. It hasnt done it in a few months. But has the last two nights. it blasts lasts for about a second then again every 3-4seconds till i close the player. again the only other time its done this once or twice in netflix and jriver. even once start the fallout3 launcher. but 95% its playing youtube. when i close whatever, i can her the cards relays click on. any ideas? it puts me into a cold sweat.


  8. taclight    05 Sep 2016 @ 12:08   

    Hey today the sound for navigating through folders suddenly turned to that scratchy noise again, tried re-installing both the recommended and the latest driver with no success, please help


    • CarvedInside    06 Sep 2016 @ 22:34   

      Tell us your OS, audio card, version of the UNi Xonar drivers installed and if you’ve set a different sample rate than 44.1KHz?


      • taclight    10 Sep 2016 @ 00:34   

        Win7, asus xonar dx, default settings – this is a general problem with this specific sound and the sound card (navigating folders), you can find tons of posts online. The most reasonable fix to this problem is the one I suggested (edit the .wav in C:\Windows\Media)


  9. Steven    05 Sep 2016 @ 21:01   

    Using UNi-Xonar-1823-v1.80a-r3.exe with Xonar Essence STX soundcard. Using ASIO with JRiver Media Player, W10 Ann. Update x64. Getting random bluescreen’s cmudaxp.sys error.

    Any fix for this as very annoying. Only happened three times in the last few weeks (use PC a great deal).




    • CarvedInside    05 Sep 2016 @ 22:25   

      Have you enabled GX by any chance? If so disable it. Other things you should try:
      Install the drivers with “Low DPC Latency” or “C-Media Panel” configuration and see if you still get the bluescreens.
      Install the v1.75a drivers.


      • Steven    06 Sep 2016 @ 11:57   

        Many thanks for the helpful advice. I’ve now installed v1.75a with Low DPC Latency selected, in test-mode. (I tried the Windows Advanced Start-up method, but my keyboard locked when trying to select the number 7 (unplugged it and tried another usb port and keyboard, also locked with number lock light on!)

        I’ll report back here if I get the blue screens again.


      • Steven    06 Sep 2016 @ 18:29   

        Another blue screen! Now reinstalled again with “C-Media Panel”. GX has been selected.

        Any other suggestions if I still get blue screening?


        • CarvedInside    06 Sep 2016 @ 22:31   

          “GX has been selected” – I don’t get this part. If you’ve installed the drivers with “C-Media Panel with GX enabled” it is not good, it will likely show more blue screens. Anyway, if installing the drivers with “Low DPC Latency” configuration still showed blue screens then you will get them with “C-Media Panel” configuration as well.
          When you run the v1.80a driver installer (without going on with the installation), on the second page does it autodetect the STX card or does it detect it as a different card?

          Why do you install the drivers with Windows in “Test mode”? Don’t the drivers install without it?


          • Steven    06 Sep 2016 @ 23:50   

            Sorry – typo – I meant to say GX has NOT been selected my error.
            Correct v1.80a would not install on Windows 10 anniversary edition without the test mode, as noted above.

            Please note I installed “UNi Xonar 1822 v1.75a r2.exe. Is that the one you wanted me to try???
            NB: I selected my STX card from the drop down list on the installation screen.

            Any other ideas?


            • CarvedInside    07 Sep 2016 @ 03:03   

              Yes, v1.75a r2.exe I wanted you to install. I suggested you to try v1.75a and I’ve asked if you run v1.80 installer without actually installing, if the card is automatically detected. With v1.80a there is automatic card detection which if it would not work would mean that there is something wrong with the card.


              • Steven    07 Sep 2016 @ 09:47   

                I see. Many thanks again. I really appreciate your help.

                I ran UNi-Xonar-STXII-11.5-v1.80b-r3 & my card was correctly identified as an STX. I have reinstalled that version again with
                Low DPC Latency selected to see if the blue screens reappear (as version 1.75a also blue screened).

                I wonder if anyone else has reported this issue running Windows 10 Anniversary Update x64?

                An updated driver would be great – ideally from Asus 🙂


                • CarvedInside    08 Sep 2016 @ 14:53   

                  So far your report about this is the only one.
                  At the moment I don’t know what else you could do except maybe revert back to previous Windows build if possible.


  10. Yoram    06 Sep 2016 @ 06:21   


    What is the best of Uni Xonar, 1.64 or 1.75?


  11. Elisey    07 Sep 2016 @ 14:18   

    So which driver better for Win 10 x64 2016 Anniversary Edition, UNi Xonar 1816/1823 v1.80a r3 or UNi Xonar 1816/1822 v1.75a r2 ? 🙂


    • Steven    08 Sep 2016 @ 09:30   

      I’ve settled on UNi-Xonar-STXII-11.5-v1.80b-r3 & selected “C-Media Panel” on installation. Make sure you install in test mode (as above). No blue screens yesterday, but
      I’m sure the occasional one will appear 🙁


  12. APoL0    09 Sep 2016 @ 07:37   

    I updated from Windows 10 x64 to Windows 10 x64 Anniversary Update with an Asus Xonar Essence STX with UNi Xonar 1823 v1.80a r3 and I have worst audio quality than before the Anniversary Update with 8Channels, PCM 96 KHz, Headphones (Extra High Gain) and 7.1 Virtual Speaker and Dolby Headphone selected in ASUS Audio Center. I switched to UNi Xonar 1822 v1.75a r2 with a clean reinstall and the sound still being worst than before the Anniversary Update with that options selected in ASUS Audio Center.


  13. That Ghost Pepper    09 Sep 2016 @ 18:05   

    Works Flawlessly on my asus xonar STX.
    Thanks a bunch 🙂


  14. Jay    10 Sep 2016 @ 07:53   

    Updated to Anniversary Win10x64. STX II. 1.80b r3. I am connecting via all analog rca’s. Stereo mode ok, 7.1 ok, 5.1 mode NOT working properly. I have tried the Asus CC and the C-media panel. In both cases when in 5.1 mode, after 1-2 minutes all sound goes to the right rear surround. I then change to 7.1 or stereo and all is ok again. It seems the only problem is with 5.1 mode. Any ideas? Thanks!!!


  15. Tom Yan    12 Sep 2016 @ 01:17   

    Hi all!

    So I am trying 1.80b “STXII” on an STX. The main reason for me to do so is the newly added “IEM” option in the headphone gain setting. I expected it to work on STX as well because STX II has the same DAC and HP Amp as STX does. However it does not seem to work. I do notice that switching from/to “IEM” to/from other gain options would cause “clicks” that we would get when we, for example, switch from “Speakers” to “Headphone”; while switching among the three other/original gain options would not. Yet the actual effect of “IEM” and “Normal Gain” sounded to be the same.

    So my question is, has anyone actually found that the IEM option does cause a difference when work with an STX II? Is it expected that it won’t really work on an STX?

    Btw, the (community) Linux driver introduced an extra gain option in correspondence to that. Instead of having an option that provides an even smaller gain than “Normal Gain”, the developer simply added an option that fills the larger gap between “Normal Gain” and “High Gain”:
    Is that NOT how the STX II driver has it done?

    It appears to me that, on both Windows and Linux, the gain setting does not actually adjust the HP Amp but the DAC. But now when switching from/to this new “IEM” option would cause clicks, I am wondering if it actually tries to bypass the HP Amp completely (i.e. RCA outputs, but merely routed to the Headphone jack). If that’s the case, is it really not possible for STX to have that as well?



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