Naming convention for audio files

File	Convention	Example	Note
Cover image	[ISBN].jpg	1234567890123.jpg
Audio book	[ISBN]_[title of the audio book].zip	9781470377793_Vacant_possession.zip	This ZIP file is actually a compressed folder containing all the audio tracks of the publication, each corresponding to a chapter. The audio tracks included in the ZIP file must also respect the naming convention (see below).
Audio track	[ISBN]_[track number]_[chapter title].mp3	9782897021047_001_Introduction.mp3	The chapter title is optional. Be sure to keep to the listening order of the tracks.

The file name is crucial and may prevent the sale of the publications at some retailers. In particular, it is important not to confuse chapter titles with track numbers. The track number should contain only numeric characters, while we recommend that you avoid numeric characters in the chapter title (some retailers do not support numeric characters in the chapter title).

Make sure that the metadata of each track of the audiobook is also properly documented.