An MPA (MPEG Audio) file includes audio data encoded by the MPEG Layer I, II, or III compression method.
These methods include multiple lossy compression algorithms that significantly reduce file size.
The different methods are also available in files, each with its own extension.
These endings are composed of mp and the name of the layer. So mp1, mp2 or mp3. Further information can be found in the corresponding articles.
Most often resolving problems with opening MPA files is very simple. Just install an appropriate program that supports such files. All of the listed programs support MPA files, but may vary in offered function and purpose. Some programs may be capable only of viewing contents of MPA 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 MPA 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 QuickTime Player applications is not on the list, select "Browse" option in order to manually locate the directory where QuickTime Player has been installed.
Sometimes problems with opening MPA files may not lie with the application itself, but can arise due to other causes, such as: