The file extension CFA is used for so-called conformed audio files from various media-processing Adobe products. CFA files are automatically generated files that are created when importing or adding an audio file to a project.
Imported audio files are converted to CFA files with 32-bit resolution (probably) without compression, to ensure the highest quality editing and faster previewing. Unfortunately, these files are usually much larger than the original files.
Depending on the file type, the program creates various auxiliary files (cfa, mpgindex) in the media cache. It also creates a media cache database that certain Adobe programs can share. This gives the programs access to the media caches of the other programs. (if available)
You can create or clean up cache folders under 'Edit-> Preferences-> Media & Disk Cache' (Windows) or 'Settings-> Media & Disk Cache' (Mac OS). These files are only necessary during a project and can be deleted after completion.
Most often resolving problems with opening CFA files is very simple. Just install an appropriate program that supports such files. All of the listed programs support CFA files, but may vary in offered function and purpose. Some programs may be capable only of viewing contents of CFA files or offer file conversion options, but may not be capable of editing such files.
It is possible that although a compatible program has been installed on user’s system, it is not used by the system to open it. This may happen because no default application was associated with this type of files. To associate CFA files with given application, select "Open with" from drop-down menu (accessed by right-clicking on the file). Then select from the list the program or application you want to be used to open this type of file. If the Adobe Soundbooth applications is not on the list, select "Browse" option in order to manually locate the directory where Adobe Soundbooth has been installed.
Sometimes problems with opening CFA files may not lie with the application itself, but can arise due to other causes, such as: