The M4A file extension falls under the MPEG-4 Part 14 multimedia specification. M4A files are most commonly audio files. M4A was originally intended to be the successor to the .mp3 audio compression file convention.
Under MPEG-4 Part 14 is based on the QuickTime file format. QuickTime File Format, or QTFF, originally specified multiple tracks of digitally encoded multimedia streams, with subtitles. Still images may also be encoded in the MPEG-4 Part 14 specification file formats. M4A formatted multimedia files are higher in quality than .mp3 files of the same size.
In addition to the problem described above, i.e. the lack of the appropriate application to support the .M4A file, there may be several reasons that cause problems with opening and operation of the data format:
A quite common problem is the lack of application in the appropriate version. Even if you have an application, with the help of which you should open the .M4A file, you may have a problem with it because of its version. Perhaps in previous versions the application has not yet supported the .M4A file, so download the update and check again.
If you have already installed the appropriate application, and it is the correct version, the file may not open correctly, because the operating system does not have information that this program supports the file. So you need to "show" which program the computer should use. To do this:
It also happens that the file you want to open is corrupt and therefore there is no such possibility. In this situation, you should find its different version, or ask a person from whom you got, to send it again.
There may be several reasons why you cannot open the file with .M4A extension. Directly on this website you can find a solution of the most common problem with the .M4A file – that you do not have on your computer the appropriate program to open the file.