Before assuming the problem is on your end, especially for more recent entries, it's a good idea to quickly verify the game's server status.
How to Fix the "Call of Duty exe err mss init failed 150" Error
The Miles Sound System can crash if your default windows audio format is set too high for the engine to process. Bringing it down to standard studio quality usually fixes the initialization loop. Call of duty exe err mss init failed 150
Follow these verified troubleshooting methods in order to resolve the crash and get your game running smoothly. 1. Enable "Stereo Mix" (The Most Common Fix)
Click the gear icon next to the Play button > Scan and Repair . Before assuming the problem is on your end,
Broken or generic audio drivers will prevent hardware-accelerated sound synchronization.
: This is the most successful solution for older CoD titles. Right-click the Speaker icon in your taskbar and select Right-click anywhere in the list and check Show Disabled Devices Stereo Mix appears, right-click it and select Plug in a Microphone Follow these verified troubleshooting methods in order to
Update or reinstall key drivers
Before diving into the fixes, it helps to understand why this happens. The error typically occurs when the game attempts to initialize the audio engine but fails. Common causes include: