APE is an audio file format that uses lossless compression. What is lossless compression? Huge WAV audio files can be compressed into APE by "slimming" Monkey's audio software. Sometimes it is used for network audio file transmission, because the compressed APE file capacity is less than half of the WAV source file, which can save transmission time. More importantly, the WAV file obtained after decompression and restoration of monkey's audio can be exactly the same as the source file before compression. Therefore, APE is called "lossless audio compression format" and Monkey's audio is called "lossless audio compression software". Therefore, on the premise of not reducing the sound quality, the size is reduced to half that of the WAV file, so it has great advantages over MP3 in sound quality. In addition, the APE format also provides real-time audio decoding. APE generally uses the file extension of APE, and sometimes uses the extension of MAC.