Export your audiobook to MP3 and M4B
When the chapters are ready, turn them into a finished audiobook file — a chaptered M4B with markers or a single universal MP3 — mastered and downloadable, with no store lock.
A finished audiobook is only useful if you can take it where you want to publish. Book Director Studio exports the file and hands it to you. Pick the format that matches your destination, and the studio assembles your rendered chapters with proper silence pacing and mastered loudness.
Choose the one-click ACX-style preset for a release-ready master, or switch to Standard and set your own format and bitrate. Every export lands in your history with its format, duration, chapter count, and size, each with its own download button.
Chaptered M4B
A single M4B with embedded chapter markers — the format Apple Books and Audible expect — so listeners can jump between chapters cleanly.
Universal MP3
A widely playable single MP3 for platforms like Findaway and for podcast-style distribution.
ACX-style preset
One click masters to 192 kbps CBR MP3 with normalized loudness, trimmed edges, and room-tone padding — plus an optional retail sample.
Standard preset
Prefer full control? Choose M4B or MP3 and set your own bitrate for the master.
Export by scope
Export the whole book or just selected chapters — handy for shipping a single corrected chapter or a sample.
Files you own
Download every export and distribute wherever AI-narrated audio is accepted. No exclusivity, no platform lock-in.
- Format
- 192 kbps CBR MP3, 44.1 kHz
- Loudness
- Mastered to roughly −20 dB RMS
- Peak level
- Peak at or below −3 dB
- Room tone
- 0.75 s opening, 2.5 s closing
- Retail sample
- Optional ~1–5 minute excerpt
- Chapter markers
- Embedded in the M4B export
The ACX-style preset masters to the ACX technical submission spec. A readiness report measures the result so you can submit with confidence, but each platform makes its own acceptance decision.
- What is the difference between M4B and MP3?
- M4B is a single audiobook file with embedded chapter markers, which Apple Books and Audible use to let listeners navigate by chapter. MP3 is a universally playable single file, useful for platforms like Findaway and for podcast-style distribution. You can export either.
- Does the export include chapter markers?
- Yes. The M4B export embeds chapter markers built from your chapters, with the chapter compilation handled automatically during export.
- Can I generate the Audible-style retail sample?
- Yes. The exporter can generate the roughly one-to-five-minute retail sample that stores like Audible request alongside the full audiobook.
- Do I keep the files?
- Yes. Every export appears in your export history with a download button, and the most recent export is also a primary download on the book page. The files are yours to distribute where AI narration is accepted.
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