Many modern PCs lack the specific legacy components needed for older games. Installing the DirectX End-User Runtimes (June 2010) is the most successful fix reported by the community. Even if you have DirectX 11 or 12, this installer adds the necessary older files required for game audio. Standard Troubleshooting Steps
If legacy software doesn't work, try these verified methods: Call of duty black ops 2 sound fix rar
: In your game directory (usually steamapps\common\Call of Duty Black Ops II\players ), try deleting the hardware and user files. The game will regenerate these with default settings on next launch. Many modern PCs lack the specific legacy components