Write for listening
Use natural sentences, clear punctuation, and short paragraphs. Commas create light pauses; full stops separate complete ideas.
IndexTTS Prompt Guide for Natural AI Speech
Structure scripts for clearer pronunciation, intentional pacing, consistent voices, and expressive delivery before spending credits on a full generation.
Prompt fundamentals
Build a reliable voice-generation script
Small improvements to text structure can reduce retries and make speech easier to direct.
Describe delivery precisely
Choose concrete direction such as warm, calm, urgent, conversational, or restrained instead of stacking vague emotional adjectives.
Protect pronunciation
Spell out uncommon abbreviations and test names, brands, numbers, and technical terms in a short sample before generating a long script.
Tune one variable at a time
Keep the text and reference voice stable while comparing speed or emotion so you can identify which change improved the result.
Example IndexTTS prompt
Use a clean English reference voice. Read in a warm, confident, conversational tone. Keep a measured pace, pause briefly after the first sentence, and emphasize the final benefit without sounding promotional.