X3daudio1_7.dll is a DLL(Dynamic Link Library) file associated with Microsoft's DirectX software. This file is usually used by windows-based games and advanced graphics programs. Video games and other 3D programs are linked using DirectX software.
Microsoft’s DirectX is a set of commands and functions (known as APIs) for creating and managing graphics and multimedia effects used in the development of games/applications. These programs are written in C++ or Visual C/C++ or Java programming language. The DirectX Software Development Kit (SDK) includes useful tools for the software developer to create or integrate graphics images, sprites, overlays animations, sounds, 3D environments, and other game elements.
DirectX is used for controlling video playback, sound effects, other peripheral inputs like joystick, mouse, keyboard, etc.
There were days where games had direct access to video cards and the motherboard where users can edit the configuration easily and make the necessary changes. But Microsoft restricted access to the low-level hardware with the release of Windows 95 showing the security issues. Then, there was a serious issue where games hadn’t direct access to low-level hardware. This problem was solved with the development of DirectX API that acts as a middleman between the games and the video cards. To take the overall advantage, we need to install the latest version of DirectX software for better performance of multimedia graphics and special effects.
To find which version is installed in your PC, Go to the Start menu and select Run -> Type dxdiag and click Ok. Then, have a look at System Information for the DirectX version number.
Call of Juarez is a first-person shooter video game developed by Techland(Polish Developer) and Ubisoft as a Publisher similar to Call Of Duty. This game was released in 2006 for the first time on Windows. This game was one of the first games to use Microsoft’s DirectX 10 software for the PC version. There are four versions of this game till now. As we know that DirectX is the main graphics software associated with this game, the X3daudio1_7.dll file is directly dependent on DirectX software.
While launching the game like Call of Juarez, we might have encountered an issue like the x3daudio1_7.dll file is missing. Have a look at the following image: 
This error might arise due to misconfigured system files in your Windows OS. The system files become corrupted or damaged while installing the Call of Juarez game. There can be several causes that may result in the system file errors like incomplete installation of the game, improper deletion of the game, malware, attacks, Windows registry caches, etc.
To fix this issue, there are several troubleshooting steps that you need to do as follows:
#1. Reinstalling the game:
You have to reinstall the game(Call of Juarez) if you find such issues. First, you have to uninstall it properly without any traces with the help of third-party applications. Restart the computer and then reinstall the Call of Juarez game again. This time your error should go away.
#2. Download DirectX from the internet:
You need to download the latest version of Microsoft’s DirectX software from the official website. After downloading, put the software files in the game directory and launch the game and check to see if the problem goes away.
#3. Update Outdated Drivers:
Well, this is not the most common way to cause an issue. But sometimes, it can cause too. If the above solution doesn’t work for you, then it’s a good time to update the video card drivers associated with it and reboot the computer. The problem should go away.
Conclusion:
X3daudio1_7.dll file missing issue when launching games like Call of Juarez might appear more often. This issue is related to Microsoft’s DirectX Software that helps the game interact with the computer’s hardware. If you run with an error related to this, consider the above troubleshooting steps to fix the problem.
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