My volume synthesizer program(SndVol.exe) has a display error.

Xiaolong Yang 5 Reputation points
2026-03-13T23:52:51.4133333+00:00

The left and right sliders at the bottom of my Volume Synthesizer (SndVol.exe) will block the mute button, and the device volume and the slider for the program volume are not aligned.User's image

屏幕截图 2026-03-14 074213

Windows for home | Windows 11 | Devices and drivers
0 comments

2 answers

Sort by: Most helpful
Most helpful Newest Oldest
  1. TaoLi 116.8K Reputation points Independent Advisor
    2026-03-14T00:49:09.63+00:00

    Hello,

    Go to Settings → System → Display → Scale, set it to 100%. If it’s already at 100%, try changing it to another value, then reopen the Volume Mixer.

    If the issue still exists:

    1. Locate C:\Windows\System32\SndVol.exe
    2. Right‑click → Properties
    3. Open the Compatibility tab
    4. Click Change high DPI settings
    5. Check Override high DPI scaling behavior
    6. From the dropdown, select System or System (Enhanced)
    7. Apply the changes and reopen the program

    Was this answer helpful?

    0 comments

  2. AI answer

    2026-03-13T23:53:04.4266667+00:00

    The behavior shown is a UI/layout issue in the classic Volume Mixer (SndVol.exe), not a problem with the audio engine or drivers. SndVol is only a visual front end over the underlying session and endpoint volume controls; misaligned sliders or overlapping mute buttons do not affect how volume is actually applied.

    For managing and troubleshooting volume, use these instead of relying on the broken SndVol layout:

    1. Use the modern Volume mixer in Windows 11 (Settings → System → Sound → Volume mixer) to control per‑app and device volumes.
    2. If an app needs to track or control its own session volume correctly, it should use the Core Audio APIs:
      • ISimpleAudioVolume for the session master volume (this is what SndVol tracks and displays).
      • IAudioSessionEvents::OnSimpleVolumeChanged to stay in sync with changes made through SndVol or other system controls.
    3. For device‑level volume defaults and ranges, rely on the endpoint volume exposed by the audio driver; SndVol simply reflects these values.

    Because SndVol is just a UI over these APIs, the misalignment is cosmetic. Audio levels are still governed by the session and endpoint volume controls underneath. To get the issue fixed, report it through the Windows Feedback Hub so the shell/UI team can correct the layout in a future update.

    References:

    AI-generated content may be incorrect. Read our transparency notes for more information.

    Was this answer helpful?

Your answer

Answers can be marked as 'Accepted' by the question author and 'Recommended' by moderators, which helps users know the answer solved the author's problem.