How to Choose an AI Voice for Narration
A repeatable way to pick an AI narrator: test on your own script, match voice to audience and content, check pacing, and avoid common mistakes.
By the MCV Labs team · · 5 min read
Most people choose an AI voice by listening to a demo sentence. Demo sentences are written to flatter the voice; your script won't be. Here's a better process.
Start from the listener
- Who is listening — beginners, professionals, children?
- Where — on a phone speaker, in a car, with headphones?
- For how long — a 15-second ad or a 20-minute lesson?
Long-form listening favours calm, even voices; short social clips can carry a brighter, more energetic voice. Learners generally prefer a slightly slower pace than marketing content.
Shortlist with samples, decide with your script
- Play the free samples in the voice library and shortlist three voices.
- Take two lines from your real script: one plain sentence and one with names, numbers or technical terms.
- Preview those lines in each shortlisted voice.
- Pick the voice that sounds clearest on the difficult line — that's where differences show.
Check language support honestly
Each voice lists the languages it supports. Many voices speak several languages but are optimised for one, so an English-optimised voice speaking Hindi will sound clear but not native. Listen to a sample in your language before committing.
Tune pace and pronunciation
- Adjust speed in small steps (0.95× or 1.05×) — big changes sound unnatural.
- Add pronunciation rules for brand names and acronyms once, then reuse them.
- Use pauses between sections rather than speeding everything up.
Common mistakes
- Choosing the most dramatic voice for instructional content.
- Changing voices between videos in the same series.
- Judging a voice only on a perfect demo sentence.
- Skipping the AI-voice disclosure to listeners.