How to Publish, Distribute, and Format Your Audiobook

When people search for how to publish an audiobook online, they usually picture Audible. Audible is one store. The audiobook market also includes Apple Books, Google Play Books, Spotify, Kobo, Storytel, Scribd (now Everand), Chirp, BingeBooks, Nook Audiobooks, and dozens of library platforms like OverDrive, Hoopla, and Bibliotheca.

You will not upload to all of these directly. Most authors publish through one or two aggregators that fan out to retailers, plus maybe one or two direct accounts.

The practical map looks like this:

• Direct retailers worth claiming yourself: Google Play Books (pays well, simple upload), Kobo Writing Life Audio (now open to more authors), and your own website via Shopify or BookFunnel.
• Aggregators that reach the rest: Findaway Voices (now part of Spotify), Author's Republic, and SelfPublishing.pro. Each pushes to a different mix of stores; pick based on which retailers they cover, not just which has the slickest dashboard.
• Audible/ACX: A separate conversation. If you used AI narration, ACX is off the table — their terms only allow AI voices generated through their own internal tools. We cover that in detail in How to Make an Audible Book (and Why You Probably Shouldn't).

If you've ever wondered how should I format audiobook files, the honest answer is "it depends on who's accepting them" — but the specs cluster around a small set of rules. Hit these and you'll pass QA at almost every retailer.

The technical spec most retailers want

• Container: One MP3 per chapter, 192 kbps CBR, 44.1 kHz, mono or stereo (mono is fine and smaller). Some retailers also accept M4B with chapter markers as a single-file alternative.
• Loudness: -18 to -23 dB RMS, peak no higher than -3 dB, noise floor below -60 dB.
• Headroom: 0.5 to 1 second of room tone at the start of each file, 1 to 5 seconds at the end.
• Opening and closing credits: Required. "Chapter X. Title. Written by Author Name. Narrated by Narrator Name." at the open; "End of book." or similar at the close.
• Retail sample: A standalone 1–5 minute MP3, same spec, that previews the book. Most retailers require this.

What trips authors up

• Inconsistent loudness chapter to chapter — usually because chapters were recorded weeks apart with different mic settings. Master them all together at the end.
• Missing or wrong-format opening credits. Retailers reject these silently sometimes; you'll just see your book stuck in "In Review" for weeks.
• A retail sample that's exactly the first chapter. Some retailers want a curated pitch, not a Chapter 1 dump.

If you're using AI narration software like AuthorVoices.ai, the export pipeline runs these masters automatically — you get an ACX-style MP3 ZIP or a single M4B with chapter markers, which is a much shorter path than mastering by hand in Audacity. (Other tools and most human studios will hand you raw WAV files; you do the mastering.)

The choice isn't really "which aggregator." It's how many places you want to manage and how much revenue you'll trade for simplicity.

Three realistic patterns

1. One aggregator, everything wide. Upload once to Findaway Voices, Author's Republic, or SelfPublishing.pro. They handle 30–50+ retailers. You take a 20–25% cut off the top vs. going direct, but you upload once. Best for authors with more than three titles or anyone who doesn't want operational overhead.

1. Aggregator + direct on the big payers. Upload to your aggregator for the long tail, but claim Google Play Books and (if eligible) Kobo Writing Life Audio yourself for the higher direct royalty. Adds two dashboards to manage but captures more income from the 20% of stores doing 80% of sales.

1. Fully direct. Manually claim accounts at every retailer. Maximum royalty, maximum hassle, and you'll still miss most of the library and international markets without an aggregator.

Royalty ranges to expect

• Direct to Google Play, Kobo, Apple: 45–70% of net.
• Through an aggregator to those same stores: 35–55% of net (the aggregator keeps 20–25%).
• Library platforms like OverDrive: typically 25–45% of net, often via a wholesale model.
• Subscription services like Everand and Storytel: per-listen royalties that are smaller per stream but volume can add up.

Before you hit "distribute," verify:

• All chapters mastered to the same loudness target (run a batch check, don't trust your ears).
• Opening and closing credits present and correctly named.
• Retail sample under 5 minutes, stand-alone, matching spec.
• Cover art at 2400×2400 pixels, square, RGB, under 5 MB.
• ISBN assigned (some retailers require an audiobook-specific one — separate from your ebook ISBN).
• Metadata locked: title, subtitle, contributors with role tags, BISAC categories, keywords, narration type disclosure if the retailer asks.
• Pricing decided per market. Don't accept defaults — most aggregators set USD prices that look weird converted to euros or pounds.

For a broader walkthrough of the steps that come before distribution — recording, editing, mastering — see How to Make an Audiobook: Complete Guide for Authors and How to Turn a Book Into an Audiobook.

Review times vary wildly. Google Play often goes live in 24–72 hours. Apple and Kobo can take 1–2 weeks. Library wholesalers can take 4–6 weeks because they batch ingests. Don't schedule a launch the day you submit — give yourself a 4-week buffer between upload and announcement, and use that time for review copies, podcast pitches, and pre-order links on the stores that support them.

The biggest mistake first-time audiobook publishers make isn't technical. It's assuming the upload is the launch. The upload is the start of a slow, staggered rollout across dozens of retailers, each with its own clock. Plan accordingly and you'll save yourself a lot of frantic emails.