Audiobook audio specs and how to fix common file problems

Audiobook stores expect consistent, clean audio. Here are the targets and how to fix files that fail.

Common targets

• Format: MP3 or M4A, one file per chapter.
• Consistent volume across all files (normalise so chapters do not jump in loudness).
• Clean signal — minimal background noise and no clipping (distortion from recording too loud).
• A short, even head and tail silence on each file.

Fixing files (free tools work)

Using a free editor like Audacity you can:

• Normalise levels so every chapter matches.
• Noise-reduce a quiet room hum.
• Trim long silences and re-export per chapter.

If a file is rejected

• Check it is not clipped (re-record or reduce gain).
• Confirm the format and per-chapter structure.
• Re-export and re-upload — see how to upload an audiobook and the recording guide.

Still need help? Open a ticket from your dashboard or email [email protected] — a real person replies.