Registry Key to Enable Classic Volume Mixer

This guide explains how to restore the classic, full-featured Volume Mixer in Windows using the Windows Registry. By configuring the EnableMtcUvc DWORD value, you can toggle between the modern flyout interface and the legacy sound control panel that allows individual application volume adjustments.

The Registry Key and Value

The specific value that controls the Volume Mixer interface behavior is EnableMtcUvc.

• Registry Path: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\MTCUVC
  (Alternatively: HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows NT\CurrentVersion\MTCUVC)
• Value Name: EnableMtcUvc
• Value Type: REG_DWORD (32-bit Value)
• Value Data:
  • 0 = Enables the classic, full-featured Volume Mixer
  • 1 = Enables the modern Windows volume interface (default)

Step-by-Step Instructions

1. Press Win + R, type regedit, and press Enter to open the Registry Editor.

2. Navigate to the following key:

   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion

3. Check if a key named MTCUVC exists under CurrentVersion. If it does not exist, right-click CurrentVersion, select New > Key, and name it MTCUVC.

4. Select the MTCUVC key. In the right pane, check for a DWORD value named EnableMtcUvc. If it does not exist, right-click an empty space, select New > DWORD (32-bit) Value, and name it EnableMtcUvc.

5. Double-click EnableMtcUvc, set its Value data to 0, and click OK.

6. The change takes effect immediately without requiring a system reboot. Clicking the volume icon in the system tray will now bring up the classic Volume Mixer. To revert back to the modern interface, set the value to 1 or delete the EnableMtcUvc value.