What ACX is and what it is not
ACX (Audiobook Creation Exchange) is Amazon's marketplace for connecting authors with professional narrators. It is not a production tool — it is a hiring platform. To publish on Audible through ACX, you need a finished, production-quality audio file. ACX does not create the audio for you.
Feature comparison
| Feature | ACX (hiring a narrator) | AudioForge (ForgeWrite) |
|---|---|---|
| Cost | $2,000-4,000 avg | ~$7.50 for 80K words |
| Turnaround time | 4-12 weeks | Same day |
| Revision control | Negotiated — extra cost | Unlimited — regenerate anytime |
| Voice options | One narrator voice | 6 AI voices — preview before committing |
| Chapter-by-chapter control | Submit all at once | Generate and preview per chapter |
| ACX requirements guide | Basic documentation | Built-in checklist with Audacity steps |
| Free preview | No — must pay narrator | Yes — browser TTS free forever |
| Royalty split | 25-40% royalty (standard ACX) | No royalty cut from ForgeWrite |
| Works for non-fiction | Yes | Yes — any manuscript type |
How AudioForge works for ACX submission
- Paste your chapter textOne chapter at a time. AudioForge handles chapters up to any length — automatically splits at sentence boundaries for clean audio.
- Preview with free browser TTSHear your chapter read back instantly. Adjust pacing. Catch errors. No cost, no API key.
- Select your voice and generate HD audioChoose from 6 OpenAI voices. Generate professional MP3. Costs roughly $0.015 per 1,000 characters.
- Download MP3 per chapter or all chapters as ZIPNamed and numbered correctly for ACX submission format.
- Normalize in Audacity (free, 30 seconds)ACX requires -23dB to -18dB RMS. Run Audacity's normalize effect. The built-in checklist walks you through it.
- Submit to ACX or Findaway VoicesUpload at acx.com (Audible) or findaswayvoices.com for wider distribution.
Honest note on audio quality
OpenAI's TTS voices (especially tts-1-hd) produce high-quality, natural-sounding narration. They do not reproduce the emotional nuance of a skilled human narrator. For literary fiction where voice and performance are central to the experience, a professional narrator may still be worth the investment. For non-fiction, business books, how-to guides, genre fiction, and most indie publishing — AudioForge produces audio that meets ACX standards and serves listeners well.