How to Write Scripts That Sound Great with AI Voiceover

AI voice models like ElevenLabs read text very literally. A sentence that looks fine visually can produce awkward pauses, wrong emphasis, or mispronounced words in the generated audio. Getting your script format right before generating saves significant re-generation time and credit usage.

Keep sentences under 25 words. Long, complex sentences with multiple clauses cause AI voices to rush or lose natural pacing. Break them up:

Instead of: "Despite the significant challenges that early settlers faced when trying to establish permanent settlements in the harsh climate of the American West, many persisted and eventually built thriving communities."

Write: "Early settlers faced brutal conditions in the American West. The climate was harsh. The resources were scarce. But many persisted — and built thriving communities."

AI voices respond to punctuation like a human speaker would respond to musical notation:

• Comma (,) — brief pause, keeps momentum
• Period (.) — full stop, natural breath
• Ellipsis (...) — dramatic pause, use for suspense
• Em dash (—) — avoid; causes awkward interpretation in most TTS engines
• Question mark (?) — raises inflection naturally

Never use em dashes in AI voiceover scripts. Replace with a comma or new sentence.

Always write out numbers in words for AI voiceover:

• "$3M" → "three million dollars"
• "10K subscribers" → "ten thousand subscribers"
• "Q3 2026" → "the third quarter of 2026"
• "AI" — spell it out on first use: "artificial intelligence (AI)"
• "NASA" — most TTS reads acronyms letter by letter; add phonetic hint if needed

Generate a test with the first 200 words of your script before committing to a full generation. Listen for:

• Any words mispronounced — add phonetic spelling in parentheses
• Sentences that sound rushed — add commas or break into two
• Unnatural emphasis — restructure the sentence so the key word falls at the end

YTVoice.app's 300,000-character limit means you can process an entire script at once once you've validated the format. Use your free 1-hour credit for test generations.