The MPGA extension is given to files that store audio data. It is a format compressed using the MPEG-1 Audio Layer 3 standard. Compression cuts a band at frequencies that the human ear cannot hear. It is characterized by very good sound quality, comparable to CD Audio with relatively small files. This quality is achieved due to the capacity used. For mono audio it is 64 kbit / s and for stereo 128 kbit / s.

Files with this format usually have the MP3 extension.