Audiobook Author: Mastering

Audiobook Author gets your recordings ready for the shop you submit to — and shows you exactly why a file is not ready yet.

CHECK • Measures every chapter against the retailer's published requirements: average level (RMS) or integrated loudness (LUFS), peaks, noise floor, room tone at head and tail, sample rate, channels and file length. • A status light per chapter. One click shows what was measured and what is required. • Checks your cover before you upload: size, square format, file type and color space.

CORRECT (PRO) • Auto-fix sets the level, holds peaks under the ceiling with a look-ahead limiter, and pads room tone taken from your own recording. • What cannot honestly be fixed — a noisy room, a recording without a single pause — is named, not hidden. • Your originals are never changed. A file in the way is moved to a backup folder, never overwritten.

DELIVER • Converts to MP3 at the target's settings — for ACX (Audible): 192 kbps constant bit rate, 44.1 kHz, mono. • Assembles a chaptered M4B audiobook with cover art and metadata for Apple Books and most audiobook players (Pro). • Retail samples, audiobook import, batch processing and your own targets (Pro).

MADE FOR THE MAC • Everything happens on your Mac: no account, no upload, no tracking. • Reads title, author and narrator off your cover art. • Long jobs run in the background; a status bar shows their progress. • In 15 languages.

LITE AND PRO Lite is free: library, cover checks, the full analysis and five MP3 conversions. Pro is a one-time purchase — no subscription — that removes the limit and unlocks every tool.

Built by one person who actually uses it. If something in your workflow is missing, write to me — I read every message.

Audible and ACX are trademarks of Audible, Inc. Apple Books is a trademark of Apple Inc. Audiobook Author is not affiliated with or endorsed by them.

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