Check the order before joining
- Choose Join MP3 and add the chapter MP3 files.
- Compare the queue with the chapter list. Numbered names such as 01, 02, and 03 are easier to check than unpadded numbers.
- Move any misplaced chapter using the arrows or drag and drop.
- Keep a direct join for spoken chapters, choose MP3 output, and click Join & Export.
Keep spoken boundaries clear
Listen near each chapter ending and opening. Trim accidental extra recording time only when you know it is unwanted. A crossfade can overlap words, so use it deliberately rather than as a default for narration.
Optional chapter references
Advanced can create a CUE sheet beside the joined audio. It records track positions for software that understands CUE sheets.
A CUE sheet is a separate file; it is not a promise that every phone or audiobook player will show built-in chapter navigation. Keep the ordered project if you may need to change the assembly later.