Some examples are but not limited to: ! # $ % & ' ^ ` ~ +.

When naming files, please use only standard US alphabetical/numeric characters.

be a 192kbps or higher MP3, Constant Bit Rate (CBR) at 44.1 kHz.

measure between -23dB and -18dB RMS and have -3dB peak values and a maximum -60dB noise floor.

have room tone at the beginning and end and be free of extraneous sounds.

have a running time no longer than 120 minutes.

contain only one chapter/section per file, with the section header read aloud.

include a retail audio sample that is between one and five minutes long.

be comprised of all mono or all stereo files.

be consistent in overall sound and formatting.

The following requirements help ensure customers get a great listen. The ACX Quality Assurance team may reject titles that do not meet these standards, and their retail release may be delayed. Create top-quality audiobooks, and maximize your sales potential by providing the best overall listening experience.Īudiobooks uploaded to ACX must adhere to the following requirements.

Credit audible