We know that people listen to their audio in very different ways. Some people listen in the car, some on standard headphones and some relax in a leather chair with a fine glass of whiskey while listening on a high-end sound system.
Because of this some people have a preference for the format in which the audio is delivered.
With this in mind sometimes we offer the choice of file types. MP3s are standard music files that can be played by any computer. M4B files are ‘official’ audiobook files that are recognised by programs such as iTunes. They automatically file themselves as an audiobook and remember your playback position. WAV files are raw high-quality audio.