How do I create an audiobook with AI narration?

Upload your book (EPUB, Kindle, PDF, DOCX, or TXT), choose from 550+ AI voices, select a narration preset (Fiction, Non-Fiction, Memoir, etc.), and click generate. Download ACX-compliant MP3 and upload to Audible, Google Play Books, Apple Books, or any audiobook distributor.

What book formats can I upload?

Notevibes supports EPUB (.epub) with automatic chapter/TOC detection, Kindle (.mobi/.azw3) with chapters preserved, PDF with AI text extraction, Word (.docx) with heading-to-chapter conversion, and plain text (.txt) with custom chapter markers.

What are the ACX audio specifications?

ACX requires 192 kbps CBR MP3, 44.1 kHz sample rate, RMS level between -23 dB and -18 dB, peak level ≤ -3 dB, and noise floor ≤ -60 dB. Every Notevibes export meets these specs automatically — no post-processing or mastering needed.

Does it handle chapter splitting?

Yes. Notevibes auto-detects chapters from EPUB TOC, PDF headings, DOCX heading styles, or custom markers in plain text. Each chapter is exported as a separate audio file with proper naming (Chapter_01.mp3, Chapter_02.mp3, etc.).

What is volume normalization?

Volume normalization ensures consistent loudness across your entire audiobook. Notevibes targets -20 dB RMS (within ACX's -23 to -18 dB range), applies peak limiting at -3 dB to prevent clipping, and keeps the noise floor below -60 dB.

What narration presets are available?

Notevibes offers 8 narration presets: Narrator (classic, measured), Fiction (expressive storytelling), Non-Fiction (authoritative, educational), Memoir (personal, intimate), Children's Book (warm, animated), Thriller/Mystery (suspenseful, gripping), Romance (emotional, intimate), and Custom (full control). Each has optimized speaking rates and recommended tone tags.

Can I publish AI-narrated audiobooks on Audible?

Yes. All voiceovers generated with Notevibes include full commercial usage rights with your subscription. Publish on Audible (via ACX), Google Play Books, Apple Books, Kobo, Findaway Voices, and any audiobook platform.

Can I convert my EPUB or Kindle book to an audiobook?

Yes. Upload your EPUB or Kindle (.mobi/.azw3) file directly. Notevibes detects chapters, extracts text, and lets you generate narration for each chapter with consistent voice and style. The complete audiobook is exported as ACX-compliant audio files.

How many voices and languages are available?

Notevibes offers 550+ natural-sounding AI voices across 40+ languages — from warm and intimate to dramatic and commanding. Narration presets include 45+ style modifiers and 18+ emotion tags for expressive, human-like delivery.

Audiobook AI Voice Generator

Your manuscript to a finished audiobook in one afternoon. Upload your book, pick a voice, publish on Audible — every export is ACX-ready out of the box.

Your manuscript is ready. Now give it a narrator.

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Press play. Hear the difference.

These narrations weren’t recorded in a studio. AI made them from text.

Now make your own

Built for Audiobook Creators

Everything you need — format parsing, ACX compliance, voices, presets, and 40+ languages.

Book Format Parsing

Upload EPUB, Kindle, PDF, DOCX, or TXT. AI extracts text, detects chapters from TOC and headings, and preserves your book’s structure automatically.

Emotional Voice AI

44 tone modifiers for laughter, pauses, whispers, and intonation. We tested every single one.

ACX-Ready Export

Every export meets Audible/ACX specs: 192 kbps CBR, 44.1 kHz, -23 to -18 dB RMS, peak ≤ -3 dB, noise floor ≤ -60 dB. No post-processing needed.

Cross-Language Narration

Narrate your book in 40+ languages. Publish multilingual editions from a single manuscript — same quality, multiple markets.

Book file in. Audiobook out.

Input

EPUB fiction novel

Output

Full-length audiobook narration

An indie author uploads their EPUB. Chapters are auto-detected from the TOC, Fiction preset with Expressive + Storytelling tones applied. Consistent narrator voice across 20 chapters — ACX-ready MP3 published on Audible in a week.

EPUB importChapter splittingACX-ready

Input

Kindle self-help book

Output

Professional non-fiction narration

A business author uploads their .mobi file. Chapters preserved, Non-Fiction preset with Confident + Direct tones. Clear, authoritative delivery at 192 kbps CBR. Published in English and Spanish.

Kindle upload192 kbps CBR2 languages

Input

PDF memoir manuscript

Output

Intimate, emotional narration

Upload the PDF, AI extracts text with layout detection. Memoir preset with Warm + Intimate modifiers. Volume-normalized output with consistent -20 dB RMS across all chapters.

PDF extractionNormalized audioMemoir

Input

DOCX children's book

Output

Animated, engaging narration

Upload the Word doc, heading styles auto-convert to chapters. Children’s Book preset with Animated + Cheerful tones. Each chapter exported as a separate file with proper naming.

DOCX importChapter filesChildren's Book

Supported Book Formats

Upload your book in any format. We handle chapter detection, text extraction, and TOC parsing automatically.

EPUB

.epub

Chapter detection, TOC parsing, automatic splitting by section

Kindle

.mobi / .azw3

Direct upload, chapters preserved, metadata extracted

PDF

.pdf

AI text extraction with layout detection, page-to-chapter mapping

Plain Text

.txt

Custom chapter markers, flexible delimiter support

Word

.docx

Heading styles converted to chapters automatically

ACX Audio Specifications

Every export meets Audible / ACX requirements out of the box. No post-processing needed.

Spec	Value
Bitrate	192 kbps CBR
Sample Rate	44.1 kHz
Format	MP3
RMS Level	-23 dB to -18 dB
Peak Level	≤ -3 dB
Noise Floor	≤ -60 dB
Channels	Mono or Stereo
Bit Depth	16-bit

Chapter Splitting & Volume Normalization

Automatically split your audiobook into chapters and normalize audio levels for consistent, professional output.

Auto Chapter Splitting

✓Detects chapters from EPUB TOC, PDF headings, or custom markers
✓Exports each chapter as a separate audio file
✓Proper naming convention (Chapter_01.mp3, Chapter_02.mp3...)
✓Opening and closing credits as separate tracks

Loudness Normalization

✓Target RMS level: -20 dB (ACX compliant range)
✓Peak limiting to prevent clipping (≤ -3 dB ceiling)
✓Noise floor control below -60 dB threshold
✓Consistent volume across all chapters and speakers