Digital Audiobook File Format and Player Requirements (ANSI/CTA-2003-C R-2019)

When you’re playing an audiobook and turn off your player in the middle of the book, the next time you turn on your player it may remember where you were in the book when you were last listening. That’s the purpose of the AutoResume bookmark defined in CTA-2003-C, and it’s only one small part of this comprehensive standard that describes how audio files can be stored and played back so users can have a good book listening experience. It describes things like how a player can determine what format the stored audio is in, who the author and publisher of the book are, the title of the book, the chapter listing, etc. CTA-2003-C applies to audiobook files using the *.aub or .mau file extensions.