The "audio" media type is one of the more basic forms of multimedia. Audio files are anything that consists solely of sound or audio (not counting cover images that music players sometimes display) that can be listened to on a digital device and stored on the same thing. Examples of audio files are .mp3 and .m4p.
Depending on the length and type of audio file an audio file can be of any size, though music mp3 files are on average a few megabytes.
To the right are two examples of audio files. Both have been shortened from their original length. The top file has not been edited further.
The other file has had it's pitch increased by 40% percent aswell as its tempo increased by 10%. All Edits were made in Audacity.