A teleprompter that listens
A speech model on the studio computer follows where you are in the book and keeps the line you are reading lit. You never scroll, and you never lose your place.
Instant ACX Ready · in your browser
Record your audiobook once.
It's ACX-ready when you stop.
A teleprompter that follows your voice, a microphone that is cleaned and levelled as you speak, and one key for a mistake. When you stop, every chapter is an MP3 measured against ACX's numbers. No editing afterwards.
Works in Chrome, Edge or Safari on a computer with a microphone. The studio opens with a licence key.
How it works
- Test your room. Five seconds of quiet. You hear your room the way ACX will: its hum, its hiss, its noise floor, and what the app does about them.
- Bring your manuscript. Word, text, RTF or PDF, or paste it in. It is split into chapters, and each chapter becomes its own file, as ACX asks.
- Narrate. Press R and read the lit line. The teleprompter moves with your voice. Stumble? Press the space bar: the app takes you back a sentence, you read it again, and the bad try is cut out.
- Look, then export. The Editing Room puts your manuscript beside what was heard. Anything it was unsure of is amber, for your ear. Export makes the MP3s and measures each one after it is made.
One key for a mistake
The space bar is a retake. A cat asks for three seconds of quiet, the teleprompter steps back to the start of the sentence, and the stumble never reaches the finished file.
Clean as it arrives
Hum and hiss are taken down, the level is set and a limiter holds the peaks while you read, so the meters under the teleprompter show ACX's numbers live.
It listens twice
After a take, a careful second listen writes down every word and compares it with the manuscript: misreads, skipped words, lines read twice, long pauses, clicks and knocks.
Room tone done for you
The start and end of every chapter get your room's own quiet, inside ACX's 1 to 5 seconds, and no stretch of dead digital silence is left in a pause.
Measured, not hoped
Each MP3 is read back after it is made and checked for loudness, peaks, noise floor, room tone and length. A number outside ACX's window is shown in red, with the reason.
Measured against ACX's numbers
These are ACX's own audio requirements (help.acx.com, last updated 15 April 2026). Instant ACX Ready aims inside each one with room to spare, then measures the file it made. Every requirement explained.
| What ACX measures | ACX's limit | What Instant ACX Ready aims for |
|---|---|---|
| Loudness (RMS) | between −23 dB and −18 dB | about −20 dB, the middle of the window |
| Peaks | no higher than −3 dB | a limiter at −3.5 dB |
| Noise floor | no higher than −60 dB RMS | your room tone at about −66 dB |
| Room tone at the start and end | 1 to 5 seconds recommended | measured on every file |
| File | MP3, 192 kbps or higher, constant bit rate, 44.1 kHz | 192 kbps CBR, 44.1 kHz, mono |
| Length | one chapter per file, 120 minutes at most | one file for each chapter |
For authors who narrate their own books
You know the book better than anyone. What usually stops an author is the editing: hours of cutting retakes and chasing a noise floor for every hour you read. Here the editing happens while you read.
For narrators producing for ACX
Record the audition, the chapters and the credits in one place, and hand in files that already meet the numbers ACX checks first, so the review is about your performance.
Get a licence key
The studio opens with a licence key: one key is one studio, with your books, takes and exports kept together and opened only by that key. To get a key, email us and say a word about your book.
AmazonDaily10k@gmail.com
Questions
Does it make an AI voice read my book?
No. You read your book; the AI only listens, to follow you and to find mistakes. ACX requires a human narrator unless it has authorised otherwise, and this is made for human narration.
Will ACX accept my files?
Every file is measured against ACX's published audio requirements, and the app tells you plainly when one passes or not. ACX's own reviewers also listen to every title, for things no meter can measure, such as performance and pronunciation, so no tool can promise acceptance.
What do I need?
A computer with Chrome, Edge or Safari, a decent microphone (a USB microphone is fine; a Bluetooth headset is not), a quiet room, and a licence key. Wear headphones so the microphone hears only you.
Where do my recordings go?
Into your own studio, which only your licence key opens. Your finished MP3s are in "Your files", to download one by one or a whole book as a .zip.
Can I stop and come back tomorrow?
Yes. Your narration is kept as you read; nothing has to be saved by hand. Sign in with the same key and carry on where you stopped.
Does it work on a phone?
It is made for a computer with a keyboard: the space bar is the retake key.