ACX requires finished retail-ready audio—rough, unedited narration won't cut it. Whether you’re new to audiobook performance or are a seasoned narrator hoping to become a more proficient producer, study up on our ACX Audio Submission Requirements, and then watch these helpful video tutorials to see exactly how to get that high-quality result. Then, visit the ACX blog for even more video instruction.
Encoding is the last step before you upload your audio files to ACX. In order for your audiobook to be released for sale, it needs to be encoded as, at a minimum, 192kbps CBR MP3s. The entire audiobook must be either mono or stereo, not a combination. We recommend mono, as it reduces the chance of problems like phasing, accidental pans, etc.
There are many DAWs and other tools available to let you encode. Some are easier to use and produce more reliable results than others.
Before converting to MP3, back up your work! We highly recommend saving a "final" version of your audiobook before beginning the encoding process. It's best to archive your completed audiobook's contents as individual WAV files (broken up by section) with the following properties:
If a section is over 120 minutes long, find a good break in the narration, and split it into two files. If the section began with a header, such as "Chapter 2", start the second file with "Chapter 2 continued". This will help listeners easily navigate between sections.
Congratulations! Your audio files are now ready for submission.