Problem:

Many Windows 11 users have been experiencing a problem with the audio where the system sounds and all the other sounds in the applications are having a low volume. An outdated/incompatible driver, audio enhancements, or the incompatible bit rate format can be some of the possible reasons for this low audio sound on your PC. This problem has mostly been noticed after the system is upgraded to Windows 11 or a Windows update is performed.

Solution:

Turn Off Audio Enhancements in Settings

Step 1. Open the Run box by pressing the Windows and R keys simultaneously.

Step 2. Type ms-settings:sound and hit Enter to open the Sound Settings.

Step 3. On this page, in the Output section click on the audio device that is causing the low audio issue.

Step 4. This opens the Properties screen for the selected device.

Here, use the dropdown associated with Audio enhancements and select Off.

Step 5. Close the Settings app.

Check if the issue still persists.