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UNi Xonar Drivers 1.75 (post periodically updated)

POST updates changelog (new or updated stuff in the post will usually be marked in red):

  • 28.10.2014 : UNi Xonar v1.75a rev.2 drivers are released.
  • 23.10.2014 : UNi Xonar v1.75b rev.2 drivers are released.
  • 22.10.2014 : UNi Xonar v1.75 drivers are released.
  • 06.01.2014 : UNi Xonar v1.72 and v1.64 rev.2 drivers are released.
  • 10.09.2013 : Good news everyone! If you ever wanted to save Xonar settings as switchable profiles, or access to most of the settings while staying away from the Asus Xonar Audio center, or just wanted something better than the Standalone Apps then you should head on to XonarSwitch Beta page (by Giulio).
  • 29.04.2013 : Added to the standalone apps pack  the Headphone AMP switch .
  • See more post updates

UNi Xonar drivers are modded drivers for the following cards:

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

  • Other C-Media 8788 audio chip based cards: Auzentech X-Meridian & X-Meridian 2G; HT Omega Claro Plus, 2, Halo, eClaro; Razer Barracuda AC-1. (more…)


UNi Xonar Features

FAQ & troubleshooting guide (updated 19.07.2014)

Useful tips & suggestions | Known issues & workarounds (updated 27.02.2013)

Having problems installing UNi Xonar drivers? Refer to this topic

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

A WORD ABOUT DONATIONS – Donation list here.

Let me first say that these drivers are free of charge for everyone. Those of you who appreciate my hard work and take pleasure in contributing, you can make a small donation (like 2 to 5$). Bear in mind you don’t donate for ASUS & C-Media intellectual property & work, you do it for the work that I have done.

CONTRIBUTIONS – Contributors list here.

Surely donating is not the only way you can support this project. You can submit your custom made skin, icon, application or any other little enchantments that can make UNi Xonar better. Lets not forget about spreading the word about UNi Xonar drivers and helping other Xonar owners.

RELEASE NOTES UNi Xonar 1818+ 1.7x

Release notes 1.75

UNi Xonar Installer changes:

  • Various changes and improvements done to the UNi Xonar installer.
  • Added warning message if installing the drivers would require Test Mode.
  • XonarSwitch is now automatically closed before installing the audio drivers.
  • Improved “Apply addons” function. Included .inf files from the drivers can now be dynamically altered. Documentation can be read here. Applying new 1.75 compatible versions of addons (like DHT4) will display the proper audio driver version now and users could now choose which addons they want to install once these are added to the Uni Xonar installer location.

The 1.75 drivers come in two variants:


Driver for previously supported cards. Same audio drivers as those in 1.72 (1816 for Win XP , 1822 for Windows Vista/7/8/8.1/10).

1.75a rev.2:

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


Driver for STX II and  STX II 7.1 cards.

1.75b rev.2:

  • Fixed issue where installer did not apply the correct audio settings (e.g. to fix surround echo). Anyone who installed the previous 1.75b drivers should install the 1.75b rev.2.

Driver changes:

  • Includes updated ASIO ( , ASUS Audio Center and C-Media Panel.
  • Includes STX II version 11.5  audio drivers (created on 18 Feb 2014).

Other notes:

  • These drivers will work with the previously supported Xonar cards on Win Vista/7/8.1/10 but may require that you enable Windows Test Mode.
  • These drivers do not work for the other Xonar cards on Windows XP.
  • XonarSwitch does not currently work with these drivers.

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.

Release notes 1.71

Driver changes:

  • Updated audio driver to 1821 for Windows Vista/7/8  and 1816 for Windows XP.
  • Includes updated driver installer

UNi Xonar Installer changes:

  • Fixed some issues with Driver cleaning module
  • Improved and fixed some potential issues with UNi Xonar Installer

Known issues :

  • C-media Panel: Enabling and disabling “7.1 Virtual shifter” option disables stereo upmix. Use “Stereo upmix switch” to re-enable it or you can use the C-media Panel v1.62 addon (it will revert to an slightly older C-Media Panel version)
  • In some cases,  WASAPI exclusive playback is interrupted by playback from other audio applications. More details here.  Fix: If you don’t use S/PDIF, disable Digital Output from Control panel->Sound. It’s confirmed that the audio drivers included in 1.70 don’t have this issue.
  • Win Vista/7/8, there are reports that you cannot play sound through S/PDIF and headphones at the same time.

Release notes 1.70

Driver changes:

  • For Windows Vista/7/8 it includes 1818 audio drivers. For Win XP it includes 1814 audio drivers.
  • Includes updated versions of Updated C-media and Asus panels.
  • Fixed HTOmega Claro 2 driver support.
  • Fixed driver signature issues for the other non-Xonar cards that were present in previous release.

UNi Xonar Installer changes:

  • Added option to apply addons at driver installation.
  • Improved Low DPC Latency option. Now it allows access to C-media Panel as well. And Asus Audio Center won’t autostart after driver installation like it previously did.
  • Improved Driver Cleaning process. Now it will clean the Panel and HsMgr(GX) processes startup entries too.
  • Reduced the overall installer size (from 13MB to 7MB)
  • Replaced Windows XP driver installer with the same one that’s being used in Windows 7. Please report if there are any malfunctions compared to previous UNi Xonar driver releases.
  • Removed “1777 drivers + Asio 1.0″. This option lives on as an addon.
  • Rev 2: Applied all UNi installer fixes from 1.71

Known issues :

  • C-media Panel: Enabling and disabling “7.1 Virtual shifter” option disables stereo upmix. Use “Stereo upmix switch” to re-enable it or you can use the C-media Panel v1.62 addon (it will revert to an slightly older C-Media Panel version)

Release notes 1.64 rev.2

  • All the improvements and changes done to the UNi Xonar installer from 1.7x versions have been incorporated into this release (like support for addons).
  • Updated C-Media Panel with the one included in 1.72 release.

Other notes:

  • New icon for UNi Xonar installer. Thanks to propheticus for concept and contribution.
  • ASUS Audio Center and C-Media Panel tray icons now have higher resolution icons. Useful for >100% DPI settings.

Read Previous Release Notes


Note about Windows 10 TP  compatibility

UNi Xonar drivers 1.72 and 1.75 will work in Windows 10 TP but since the drivers and not made for Windows 10 there could be some issues here and there (like this one).


Driver Downloads:

  1. UNi Xonar 1816/1822 v1.75a r2   mirror   (latest)
  2. UNi Xonar STX II 11.5 v1.75b r2   mirror   (latest)
  3. UNi Xonar 1816/1822 v1.72    mirror   
  4. UNi Xonar 1816/1821 v1.71    mirror
  5. UNi Xonar 1814/1818 v1.70   mirror   
  6. UNi Xonar 1814/1815 v1.64 r2   mirror    (proven stable)
  7. Older versions : v1.63 beta; v1.62 betav1.54 ; v1.61 ; v1.53

Official addons (Addons documentation):

  1. “1777 drivers + Asio 1.0″ aka “ASIO 1.0 Patch”. Info.
  2. C-media Panel v1.62 (fixes stereo upmix turning off for v1.64 rev.1 drivers)

Standalone applications for changing settings : 

1. Standalone apps pack* & mirror (legacy, check XonarSwitch instead) containing :

    1. Front panel switch v3.2
    2. SampleRate switch v1.2
    3. Microphone Array Enabler v1.1 – Might be useful if you have an microphone array
    4. HDAV HDMI enabler v1.0 – This application hasn’t been tested please submit feedback if it works or not. It appears it is not needed anymore.
    5. Acoustic Echo Cancellation enabler v1.0 – Useful for other Cmedia 8788 based cards that lack this setting
    6. Stereo upmix switch v1.0
    7. 7.1 virtual speaker shifter enhanced profile v1.0 – Profile created by Cu. This profile should enhance the effect of positioning in games when using Dolby Headphones and 7.1 virtual speaker shifter. Please provide feedback about this profile. Demo.
    8. Headphones ohm Amp switch v1.0  – Works only with the cards that support this.

*All these apps are based on scripts created by Virus. Before running the files, close any audio source/application.

2. Other Xonar related applications:

    1. Front Panel switch new versionmirror (by Virus; notes)
    2. ASIO settings viewer/changer (ext link)
    3. Audio re-starter for sound loop problem for Win Vista/7/8 by Razord93 (ext link)
    4. Xonar-EQ – Control Xonar equalizer settings from your Android phone or tablet. By Sascha.


  1. Roman    24 Oct 2014 @ 11:07   

    I’ll. what issue was that, something along with the installation?


    • CarvedInside    24 Oct 2014 @ 15:54   

      Please use the reply button properly. When replying to an existing discussion use reply button floating on the right of the comment you are replying to.
      Now, if you are using a NoScript browser addon then you should disable it so that reply to discussion button works correctly.

      It was a problem with the driver installation that did not apply the correct audio settings for the cards (e.g. to fix surround echo).


    • desmond    29 Oct 2014 @ 22:29   

      Hi, thanks for creating this driver, Asus should pay you for their incompetencies…everything works great, the bass is really good with this driver and nice to see 24bit/192khz output. The original driver from Asus did not have that option.

      The Xonar application is useless it seems and colours the sound too much. I am experiencing a problem right now tho. I’m running Win7home premium, using SPDIF to DAC works fine when I check off the PCM box in the Xonar App. However, I cannot switch to the analog line level out for the front L/R speakers that’s plugged in already. So my setup is this spdif is for hifi listening through my amp. Line level for crappy computer speakers. The line level analog connector does not work. Is that driver issue as well? This even after I disable the spdif connection.

      Any help is much appreciated.


      • CarvedInside    30 Oct 2014 @ 20:50   

        You’ve replied to someone else’s comment. In your case you should have made a new comment.
        Analog line out not working could mean there is something wrong with your card. Be sure that the computer speakers actually work, try them with onboard audio. You could also try re-installing UNi Xonar drivers or try a different version just in case something went wrong with the installation but this is highly unlikely. If your Xonar card doesn’t have warranty anymore you could try to use the Rear jack instead of Front jack for speaker out by configuring the drivers to allow stereo upmix (see FAQ Q&A4).


  2. asdf    24 Oct 2014 @ 12:58   

    I have a problem with the latest releases. I have windows 7 with TWO ASUS Xonar cards, a PCI essence ST card and a PCIe STX II card (non 7.1). Previously i have been running the UNi Xonar v1.72 & the official STX II drivers. BOTH cards worked fine. Now i am running the UNi Xonar v1.75b rev.2 & UNi Xonar v1.75 drivers. No matter what i do only the old essence ST card works now. The new STX II card doesn’t register in control panel or anywhere even with just the rev 2 driver installed. Anything i am doing wrong here?


    • CarvedInside    24 Oct 2014 @ 16:23   

      Does STX II card show as installed and working in Device Manager? When you say they were working fine are you saying that you had 2 Asus/Cmedia panels one for each card and now you have only one and it’s only working for the Xonar ST?


  3. Chris    25 Oct 2014 @ 10:36   

    I tried to install 1.75b2 on Windows 10 with Test Mode enabled, but says to plug-in my xonar device. I have Essence STX.
    1.75a Works fine.


  4. Dima    25 Oct 2014 @ 18:35   

    Xonar D1 Windows XP. Driver v1.75a. Asus Control Panel and C-Media panel dont work. Shows message “can’t find supported device”


  5. TomP    26 Oct 2014 @ 14:33   

    I now have my HDAV Slim 1.3 and see there is a “HDAV HDMI enabler v1.0″ in the Add-Ons list. Do I need this add-on as well as the 1.75a drivers? and what does it do?


    • CarvedInside    26 Oct 2014 @ 19:34   

      “HDAV HDMI enabler v1.0″ is a standalone application and not a addon. I made it case HDMI options would not show in the Asus Xonar Audio Center for HDAV cards and UNi Xonar drivers. I don’t think you’ll need it.


  6. BrianB    26 Oct 2014 @ 20:18   

    The New drivers(the one that requires test mode on older cards) fixed some problems on my Xonar DX(using analog). :D


    • BrianB    26 Oct 2014 @ 23:38   

      Well i should really say what it fixed, it fixed the Upmix problems i’ve been having in conjuction with K-lite(i dunno how this got fixed by a driver update). And C-media panel now opens the actual window instead of first opening and putting it on the taskbar(which made it real awkward)


  7. aramil1990    27 Oct 2014 @ 02:46   

    Thanks for the new driver. I have a Xonar STX and with the drivers 1.75b in the section info in ASUS control pannel ASIO version results: N/A. With foobar2000 I can use ASIO at 32 bit but if I switch to 64 bit results a error: “Unrecoverable playback error: Could not locate the specified virtual ASIO device” with previus version worked fine, i think there are an issue in the installation.
    PS: sorry for my english


  8. Ernest    27 Oct 2014 @ 15:38   

    Just a word to thank you for your work! I had several troubles with the official Asus driver and Xonar STX on Win7 64bit and Asus audio center, and the drivers are no more updated for win7. With your driver version, I have no more problem, sound is great and much better than before! Wonderful!
    I have installed UNi Xonar v1.72 for now, since several comments reported issues with 1.75 and 1.75b, but will catch future updates. Thank you!


  9. Garik    28 Oct 2014 @ 09:56   

    Is it posible to make updated ASIO for old xonar cards(ST and STX)?

    Thank you for making UNi Xonar Drivers!


  10. asdf    28 Oct 2014 @ 16:11   

    Hi there Carved.
    OK. I just uninstalled all previous drivers. Did a clean fresh “UNi-Xonar-STX-II-11.5-v1.75b-r2″ install with normal asus audio centre option, cleaning before install and i picked the xonar essence STX II card from the drop down field. During installation one of my two cards clicks audibly. Hard to say which one really. After installation it says “ASUS Xonar Essence ST Audio device” in the windows 7 (x64) control panel which basically means the STX II 1.75b driver only installs my Essence ST (PCI) card. The STX II (PCIe) doesnt register anywhere. I have the basic ASUS Essence STX II that comes without the 7.1 daughterboard. Previously the STX II had the grey ASUS audio centre icon in tray with the official drivers. And for the essence ST card i had to manually click the blue uni xonar 1.72 icon. For some reason both tray icons and applications could not exist at the same time. Happily providing you with all the info you need. And thanks for the hard work!


  11. asdf    28 Oct 2014 @ 16:43   

    Update: I have them both running now. The STX II installs fine via device manager driver update, and then navigating manually to the UNI driver folder. At first it will say “device status:
    Windows cannot load the device driver for this hardware because a previous instance of the device driver is still in memory. (Code 38)” for the essence ST card in device manager. And when i install the “UNi Xonar 1816/1822 v1.75a r2″ after that i get them both running. Happy happy joy joy :D


    • asdf    28 Oct 2014 @ 17:28   

      Update 2: It seems like i can only have one Asus Audio Centre installed at a time. So every time i want to use the STX II card i have to reinstall the driver to get the proper audio centre. I love switching between both cards since they have different voiced OpAmps on them.


      • asdf    28 Oct 2014 @ 17:32   

        Suggestion…. is it possible to make the STX II audio centre a different colour to indicate its the second gen card like asus did with theirs?
        Talking about the tray icon/colour.


      • CarvedInside    29 Oct 2014 @ 20:16   

        Might want to try this: assuming the last drivers have installed are 1.75a, go to Asus STX II original drivers and search for CustomApp folder. Copy it somewhere else (but don’t replace the CustomApp folder in Program Files\UNi Xonar Audio\), then from where you copied it, rename AsusAudioCenter.exe to AsusAudioCenterSTXII.exe. Try launching the AsusAudioCenterSTXII.exe, try it with the AsusAudioCenter.exe from UNi Xonar CustomApp (or the Start->Programs->Uni Xonar shortcut) running and if that does not work then try with AsusAudioCenter.exe closed. This method should at least let you have control over one of the cards without installing the drivers over and over.



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