When an audio file (any audio file) is a “loop” that simply means it is capable of looping, how you loop it is up to you. There are two main methods; either paste the file end to end in editing software, making a seamless file of your own length without having to actually edit the file itself. The other way is to play it back with a playback device or software capable of seamlessly looping audio. Audio files will not just magically loop on their own.