Right-click the in your taskbar and select Sound Settings or More sound settings . Go to the Recording tab.
The " Call of Duty exe err mss init failed 150" error is a common initialization failure that prevents the game from launching. This error specifically refers to a failure in the , a software library used by older Call of Duty titles like Call of Duty 2 and Call of Duty 4: Modern Warfare to handle audio. Common Causes of Error 150 Call of duty exe err mss init failed 150
Right-click in an empty space and select . If Stereo Mix appears, right-click it and select Enable . Restart the game. 2. Verify Audio Output Connections Right-click the in your taskbar and select Sound
For many users on Windows 10 and 11, the game requires an active recording device to launch. This error specifically refers to a failure in
Ensure that a set of speakers or headphones is physically plugged into your PC before launching. The MSS engine often crashes if it cannot find a valid playback device at startup. 3. Update or Reinstall Sound Drivers