How to Use Fish Audio API for Audiobook Production
Fish Audio is one of the most natural AI voice models available. This guide walks through producing a complete audiobook using Kitta AI, which is built on the Fish Audio API.
Why Fish Audio for Audiobooks?
Fish Audio's S1 model ranked #1 on TTS-Arena2, known for emotion control and naturalness. For audiobook production, it has three key advantages:
Voice Cloning
Clone any voice from just 10 seconds of audio — maintain consistent narration throughout the book.
Emotion Control
Open-domain emotion annotation makes dialogue scenes vivid, not robotic.
40+ Languages
Train once, publish in multiple languages — ideal for international audiobook releases.
Production Workflow: 5 Steps
Prepare reference audio
Record or collect 10–30 seconds of clean audio. The cleaner the sample (no background noise), the better the clone. Supports MP3, WAV, M4A.
Create a voice model in Kitta AI
Log in to Kitta AI, go to Voice Cloning, upload your reference audio, name the voice, and click Start Cloning. Training completes in about 1 minute.
Split your manuscript
Divide the manuscript by chapter. Keep each segment under 1,000 words. Use Kitta AI's Long Text Mode or Batch Mode — the system handles splitting automatically.
Generate and download audio
Select your cloned voice model, paste the text, and click Generate. Batch-generate multiple chapters, then download the MP3 files.
Post-processing (optional)
Use Audacity or Adobe Audition to normalize volume across chapters and stitch them together for the final audiobook file.
Tips for Better Quality
Include emotional variation in your reference audio (not just flat reading) — the cloned voice will be more expressive
For dialogue, add emotion cues in the text like "(excitedly)" — Fish Audio supports natural language emotion control
Keep each text segment to 500–800 words for best quality on long-form content
Use the same voice model for all chapters of a book to maintain consistency
FAQ
Is Fish Audio API good for audiobook production?
Fish Audio API is well-suited for audiobook production. It supports voice cloning from just 10 seconds of audio, 40+ languages, batch text processing, and low-latency generation. Kitta AI is built on Fish Audio API and provides a simpler interface for creators.
How much does it cost to produce an audiobook with Fish Audio?
Fish Audio offers a free tier (8,000 credits/month, ~7 minutes of audio). Via Kitta AI, which uses Fish Audio technology, the free plan includes 1,000 credits and paid plans start at 20,000 credits/month.
How many credits does a 100,000-word audiobook require?
At standard Kitta AI pricing, 100,000 characters requires approximately 100,000 credits (1 credit = 1 character). The Pro plan includes 20,000 credits/month — for a full audiobook, a top-up plan is recommended.
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