ACX (Audiobook Creation Exchange) Settings: A Complete Guide for Beginners

You’ve written a book. You’ve heard audiobook sales are growing. Now you’re staring at the ACX (Audiobook Creation Exchange) dashboard, and the settings menu looks like a cockpit. Relax. You don’t need to master every toggle to get your book into Audible. You need to understand a handful of decisions that shape your royalties, your rights, and your narrator’s workflow. Let’s walk through them in the order you’ll actually encounter them.

What ACX Actually Is (And Why the Settings Matter)

ACX is Amazon’s marketplace that connects authors, narrators, and producers. You upload your manuscript, choose how you want to produce the audiobook, and set the terms for distribution. The settings you choose here determine two things: how much money you make per sale, and how much control you keep over your work.

If you’re a time-pressed author—say, a consultant who wrote a book between client calls—you don’t want to renegotiate these terms later. Getting them right upfront saves you a headache down the road.

The Royalty Structure: 20% vs. 40% — The First Fork in the Road

This is the biggest decision you’ll make. ACX offers two royalty options:

• Exclusive Distribution (40% royalty): You let Audible, Amazon, and iTunes have exclusive digital audio rights for 90 days. In exchange, you get a 40% royalty on every sale.
• Non-Exclusive Distribution (20% royalty): You keep the right to distribute the audiobook elsewhere—like through your own website or other platforms. You get a 20% royalty on ACX sales.

The trade-off: If you value maximum reach and simplicity, choose exclusive. Audible is the dominant player in the audiobook market, and 40% of a high-volume sales stream usually beats 20% of a trickle. If you already have a direct sales channel—say, a loyal email list that buys from your site—non-exclusive might make sense.

A concrete example: A self-published sci-fi author with a modest following might earn $500 in royalties from ACX exclusive sales in a year. The same author, going non-exclusive, might sell 200 copies on ACX at 20% and another 300 through their own store. The math depends entirely on your audience size. If you don’t have a proven direct-sales channel, exclusive is the safer bet.

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Production Type: The “Who Does the Work” Decision

ACX gives you three production paths. This isn’t just a workflow choice—it changes your upfront costs and your time commitment.

• Author-Controlled: You hire a narrator directly, manage the recording schedule, and pay per finished hour. This gives you the most control over casting and quality, but it requires you to audition narrators, review audio files, and handle communication.
• Producer-Controlled: A producer manages the entire process—finding the narrator, recording, and delivering the files. You pay a premium for this convenience, but you’re mostly hands-off.
• Royalty Share: You pay nothing upfront. The narrator agrees to split the audiobook royalties with you—usually 50/50—after production costs are recouped. This is attractive if you have no budget, but it means the narrator is incentivized to promote the book too.

The catch with royalty share: Not every narrator accepts it. Established professionals with full schedules often skip royalty-share projects because they need cash flow. If you’re a first-time author with no track record, you might find fewer takers.

A practical example: A business author with a $2,000 budget for production can hire a mid-tier narrator for a 5-hour book at roughly $400 per finished hour. That same author, with zero budget, might find a newer narrator willing to work on royalty share—but they’ll need to audition more candidates to find one.

A warning about royalty share: If you choose this route, read the narrator’s contract terms carefully. Some royalty-share agreements include a clause that lets the narrator buy out their share after a set period—meaning you could lose a chunk of your future royalties if you don’t catch it early.

Audio Quality Settings: The Technical Threshold You Can’t Skip

ACX has strict audio specifications. You don’t need to be an audio engineer, but you need to know the numbers:

• Sample rate: 44.1 kHz
• Bit depth: 24-bit (or 16-bit if your recording setup can’t handle 24)
• File format: WAV or MP3 (WAV is preferred for mastering)
• Noise floor: -60 dB or lower (meaning the background hiss is nearly inaudible)
• Peak level: -3 dB to -20 dB (your loudest moments shouldn’t clip)

Why this matters: If your narrator delivers files that don’t meet these specs, ACX will reject them. You’ll get an email saying the audio failed quality control, and you’ll have to go back to the narrator for fixes. That’s lost time.

A concrete anchor: The audiobook Born a Crime by Trevor Noah, narrated by the author himself, is a great example of how delivery and pacing matter more than studio polish. Noah’s performance carries the book, but the production still meets ACX’s technical standards. You don’t need a Hollywood studio—you need a quiet room and a decent microphone.

How to verify your audio passes before submission: Ask your narrator for a 2-3 minute test file from the middle of the book—not the opening chapter, which they’ll naturally polish. Run it through a free audio analyzer like Audacity’s ACX Check plugin. If the file shows a noise floor above -60 dB or peaks above -3 dB, request fixes before they record the full book. This single step can save you weeks of back-and-forth.

Rights and Territories: Who Can Sell Your Book Where

When you set up your ACX account, you’ll choose which territories get distribution rights. The default options are:

• Worldwide: Your audiobook is available everywhere Audible operates.
• US and UK only: You restrict distribution to those two markets.

The nuance: If you choose US and UK only, you can later sell rights to other markets separately. If you choose worldwide, you’re giving ACX exclusive global digital audio rights (under the exclusive royalty option). For most authors, worldwide is the right call—it maximizes exposure. But if you have a separate deal in, say, Germany, you might want to hold back those rights.

A decision rule: If you have no existing international distribution deals, choose worldwide. If you’re working with a foreign publisher or agent, check your contract before clicking.

A real-world scenario: An author who signed a German translation deal with a Berlin publisher found that choosing “worldwide” on ACX created a rights conflict. The German publisher wanted exclusive German-language audio rights, but ACX’s worldwide option had already locked those. The author had to wait out the 90-day exclusive period before the German deal could proceed. If you have any international publishing relationships, even tentative ones, verify your ACX territory settings against those contracts first.

The Manuscript Upload: Formatting That Actually Matters

ACX requires a manuscript file—usually a Word document or PDF—so narrators can read your text. The settings here are simple, but they trip people up:

• Use a clean, standard font: Times New Roman or Arial, 12-point, double-spaced.
• Number your pages: Narrators need to reference specific spots during recording.
• Don’t embed images or tables: They don’t translate to the narrator’s reading copy.

Why this matters: A messy manuscript slows down your narrator and increases the chance of misread lines. If you’re recording a nonfiction book with data-heavy sections—say, a finance guide with charts—make sure the text version is clear enough to read aloud without visual aids.

A formatting tip that saves time: Add a pronunciation guide as a separate appendix page at the front of the manuscript. List every proper noun, technical term, and foreign phrase with a phonetic spelling. Narrators appreciate this more than almost anything else you can do—it prevents mid-session stops and reduces the number of retakes you’ll need to approve.

Reviewing the Audio: Your Quality Control Checklist

Once your narrator delivers the first 15 minutes of audio (the “pilot” or “sample”), you’ll review it. This is your chance to set the tone for the rest of the project. Listen for:

• Pacing: Is the narrator reading too fast or too slow? Most audiobooks run 150-160 words per minute.
• Character voices: If your book has dialogue, do the voices feel distinct?
• Pronunciation: Are technical terms or names read correctly? For example, if you wrote a book about the philosopher Søren Kierkegaard, the narrator should know it’s “KERK-uh-gore,” not “Kire-ken-gard.”

A time-saving tip: Listen to the sample at 1.5x speed first. If it still sounds natural, the pacing is probably fine. Then listen at normal speed for pronunciation and tone.

When to stop and escalate: If the pilot sample has more than three noticeable errors—mispronunciations, background noise, or inconsistent pacing—stop the review and request a new sample before the narrator records the full book. Don’t assume the issues will fix themselves in later chapters. If the second sample still fails, it’s time to terminate the agreement and audition a different narrator. ACX’s platform allows you to end a project without penalty before the full recording is delivered.

The 90-Day Clock: What Happens After You Publish

If you choose exclusive distribution, your audiobook is locked to Audible, Amazon, and iTunes for 90 days. After that, you can opt out and go non-exclusive. This is a safety valve, not a trap.

The practical implication: If your audiobook performs poorly in the first three months, you can pull it and try other platforms. If it performs well, you’ll likely stay exclusive for the higher royalty rate.

A success signal to watch: During the first 90 days, monitor your Audible sales dashboard weekly. If you’re seeing consistent sales—even modest ones—by week six, the exclusive arrangement is working. If you’ve had zero sales by week eight, start planning your non-exclusive exit strategy. That might mean setting up a direct sales page on your website or exploring other audiobook distributors like Findaway Voices.

FAQ

Q: Can I change my royalty option after I publish?

A: Yes, but only after the initial 90-day exclusive period ends. You can switch from exclusive to non-exclusive, but you cannot switch from non-exclusive to exclusive without re-uploading your audiobook.

Q: Do I need to pay for a professional narrator, or can I record my own audiobook?

A: You can record your own, but ACX requires the audio to meet professional technical standards. If you have a quiet recording space and a good microphone, it’s possible. If not, hiring a narrator is usually worth the cost.

Q: What happens if my narrator delivers poor-quality audio?

A: You have the right to reject the files and request fixes. ACX also has a dispute resolution process, but it’s better to communicate clearly with your narrator before escalating.

Q: How long does it take to get my audiobook live on Audible?

A: After you approve the final files, ACX typically takes 10-14 business days to review and publish your audiobook. It can take longer during peak seasons.

Q: Do I need an ISBN for my audiobook?

A: No. ACX assigns a free ISBN to your audiobook as part of the distribution process.

Your Next Step: Start With One Decision

You don’t need to understand every ACX setting to begin. Start with the royalty structure, then choose your production type, then worry about the technical specs. The dashboard will guide you through each step, and you can always pause and research before committing.

The audiobook market is growing, and your book deserves to be heard. The settings you choose today will shape how that happens—so take your time, make the calls that fit your goals, and let the production process do the heavy lifting.