Xonar drivers increase microphone volume by 3 dB tweak

What it does

This tweak increases microphone volume input by 3 dB which can be considered as a 10-15% increase when recording the voice through the microphone and as up to 40% increase when recording from high volume sources.

I invite you to test this tweak and submit feedback. I’m interested in hearing if you find the mic volume increase useful and if you consider that this tweak should be enabled by default with UNi Xonar drivers.

Tweak works for the all the UNi Xonar supported 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.

How to apply the tweak

  • Download and extract this file.
  • Run “apply.exe”.
  • For v1.80 and older drivers: Close any application that uses the soundcard and run “restart card.exe”. You would hear the card popping if the restart went through, if you didn’t hear that then restart the PC.
  • For v1.81 drivers: Restart the PC. Do not run “restart card.exe” as it will result in a blue screen.
How to restore to the default behavior
  • Run “restore default.exe”.
  • For v1.80 and older drivers: Close any application that uses the soundcard and run “restart card.exe”. You would hear the card popping if the restart went through, if you didn’t hear that then restart the PC.
  • For v1.81 drivers: Restart the PC. Do not  “restart card.exe” as it will result in a blue screen.

Microphone input volume detailed results and observations

Using a loop cable between microphone and analog output I’ve recorded the input of 2 files, one was a voice file at volume level of someone speaking in the microphone and another file was a melody at a higher volume. I’ve used ocenaudio program to record, adjust those recordings so that they where the same length and contained the same playback segment and finally to generate statistics of RMS power.

RMS PowerDriver default (dB)Tweak applied(dB)Difference (dB)Difference (%)
Voice file

at microphone

voice volume

Music file at

higher volume

where 0 is maximum

The percentage results are only there because it’s a easy to understand figure, the actual volume increase is not percentage based.

Voice file Minimum RMS Power results show that low volume sounds (as background noises are) are increased by a smaller amount with the tweak, which is a good thing.

The minor problem that probably won’t affect anyone

For sounds louder than -4dB the increases are variable, so if you were to record some high volume sounds that have noises both above -4dB and between -4 and 0 dB you should not apply this tweak as the recorded sound won’t be a accurate representation since not all sounds will be increased by the same amount.

Sounds betweenVolume increase by


-30dB to -4dB3dB
-4dB to -3dB2.4dB
-3dB to -2dB2dB
-2dB to -1dB0.6dB

Waveform comparison

In the image below I’ve overlapped the two waveforms resulted from recording playback of a music file using a loop cable between microphone and analog output. Output volume was 8%. Microphone input volume was 100% with “Microphone boost” active.

Xonar Microphone Volume Tweak Comparasion


When submitting feedback please include the following: audio card, audio driver version, Windows version.


  1. Adi12 Oct 2017 @ 11:19

    Hey guys,

    Windows Defender detected Trojan:Win32/Tilken.B!cl in this package I believe. Most likely a false positive, but letting you know.


    • CarvedInside12 Oct 2017 @ 12:28

      Thank you for the information. Yeah it’s a false positive. I’ve submitted the files to Microsoft, hopefully they will correct this as soon as possible.


  2. FDr21 Oct 2017 @ 06:55

    I’m not seeing any boost in Audacity after running the apply.exe and restarting. Windows 10 x64, Xonar DGX, 1.81a. Am I supposed to extract the files anywhere in particular?


    • CarvedInside21 Oct 2017 @ 07:29

      No need to place them in a specific place. To verify the tweak applied go the registry settings (FAQ 5.1) and check if MicinHardwareGain key is 00 00 00 00.
      Note that this volume increase only applies to the Microphone input and not the Line-In input.


  3. GVR23206 Dec 2017 @ 10:32

    Could you make the same tweak for line-in please? Many people write that it’s impossible to record from vinyl (or another source, from VHS for example). I have the same problem. In the Windows volume settings Line-in volume is 100%. But in Audacity (or in any other sound editor) the record volume does not exceed ~ -15db. Windows 8.1 x64, Xonard D2x Pci-e, driver v.1.80a
    I tried to record under Linux Ubuntu, there volume control is up to 150%, and this solves the problem. But what to do under Windows, I do not know. I will be grateful for the solution of the problem.


    • CarvedInside06 Dec 2017 @ 11:07

      So far I haven’t found a way to do that. Line-in may be recording at maximum. In Linux, the 150% volume may mean that it’s digitally amplified by the software.


  4. MarcTT02 Feb 2018 @ 21:36


    Thanks for this interesting tweak.

    I would be very interested to know of there is also a tweak (or a mod) to boost the line-in input. I use an essence stx to capture audio via the line input but the signal is a little too weak and I don’t want to add a preamp nor use the microphone route (noise).



  5. Fábio11 Jun 2018 @ 05:05

    Applied it and it worked like a charm. Thanks!


  6. Deakin05 Jul 2018 @ 04:50

    Any chance for like a 9db Tweak haha? or how i could do that myself? The fix worked great but still a tad quiet haha



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