You're here because you have a file that has a file extension ending in .ddb. Files with the file extension .ddb can only be launched by certain applications. It's possible that .ddb files are data files rather than documents or media, which means they're not meant to be viewed at all.

Digidesign database files are classified as data files that are saved in the DDB format, and these are also called application support files. These DDB files are affixed with the .ddb extension and are generated by the Avid Pro Tools software. The Avid Pro Tools application was developed by Avid Technology as a program for converting Microsoft Windows-based systems and computers running on Mac platforms into DAWs (digital audio workstations). The content of these DDB files are referenced by the Avid Pro Tools software whenever a user requests for application support details for an associated audio project created using the Avid Pro Tools application. The data stored in these DDB files consists of configuration settings entered by the authors of the Avid Pro Tools projects corresponding to the DDB files, and these DDB files are given "volume" by the Avid Pro Tools program as the default name of the DDB file. Avid Technology is now the name of Digidesign, and Microsoft Windows or Mac users can install the appropriate versions of the Avid Pro Tools software to implement support into their systems for these DDB files.

Launch a .ddb file, or any other file on your PC, by double-clicking it. If your file associations are set up correctly, the application that's meant to open your .ddb file will open it. It's possible you may need to download or purchase the correct application. It's also possible that you have the correct application on your PC, but .ddb files aren't yet associated with it. In this case, when you try to open a .ddb file, you can tell Windows which application is the correct one for that file. From then on, opening a  .ddb file will open the correct application. Click here to fix .ddb file association errors

Be careful not to rename the extension on .ddb files, or any other files. This will not change the file type. Only special conversion software can change a file from one file type to another.

A file extension is the set of three or four characters at the end of a filename; in this case, .ddb. File extensions tell you what type of file it is, and tell Windows what programs can open it. Windows often associates a default program to each file extension, so that when you double-click the file, the program launches automatically. When that program is no longer on your PC, you can sometimes get an error when you try to open the associated file.