AI Voice for Ads: Ad Voiceovers and Test Reads Fish Audio
Hook in three seconds, one script many reads: the ad voiceover workflow with per-version credit math, cutdown planning and the commercial rights ads need. Start from $9 with no subscription.
An ad is a performance test with a budget attached. The script sets the offer, the edit sets the pace, and the read decides whether anyone stays for the second sentence — which is why testing two or three reads costs less than losing the one you shipped. Studio time stopped being the bottleneck; the script is.
This guide covers the ad voiceover workflow, the per-version math, and what changes when the work is commercial.
Why the read decides the ad
- The first three seconds are audio too. The hook has to work with the sound off and with the sound on. Write the first sentence, test it against the voice, and cut anything that needs setup.
- Pace is part of the offer. A slightly fast, confident read carries urgency; a slow announcer read turns an offer into a lecture. Short sentences and clean punctuation are the pacing controls.
- The offer has to land clean. Price, deadline and action read once, clearly, near the end — no mumbling through the terms.
- Reads are variables you can test. Same script, different voice or energy, is a proper A/B test for creative. Testing reads is usually cheaper than testing audiences.
The ad voiceover workflow
- Write for the length you bought. 15 seconds is about 40 words, 30 seconds about 75 to 90, 60 seconds about 150 to 170. Hook first, one idea, offer last.
- Generate two or three reads. Different voice or different energy — calm versus energetic — using the same script, so the comparison is honest. The voice library tags voices by fit.
- Judge muted first. Watch the reads with captions and no sound, then with sound. The read that survives both passes earns the spend.
- Cut cutdowns from the same voice. Regenerate the 15 or 60 second version of the winning script with the same voice rather than re-cutting audio — the pacing stays right at every length.
What can you ship with generated reads?
- Paid social and UGC-style ads — the TikTok voice guide covers the native-feeling short-form read.
- Product and promo videos — launch clips, feature spots and seasonal promos for landing pages and stores.
- Localized campaigns — the winning script re-voiced into each market language while keeping the same voice; the dubbing guide covers re-voicing an existing edit.
- Radio and streaming reads — spots that live on audio alone, where the pace does all the work.
What does an ad voiceover cost?
Ads are short, so the math stays small:
| Version | Words | Characters | Approximate cost |
|---|---|---|---|
| 15 second ad | ~40 | ~250 | 1 credit |
| 30 second ad | ~90 | ~500 | 1 credit |
| 3-read test of one script | ~270 | ~1,600 | 2 credits |
| 10-variant test batch | ~900 | ~5,000 | 5 credits |
A full testing cycle sits far inside one $9 Starter pack, but ads are commercial work: the $29 Creator pack adds the commercial usage rights that monetized campaigns and client deliverables need. The commercial use guide covers what each pack includes. Packs are one-time purchases, credits stay valid for 12 months, and there is no subscription.
Frequently asked questions
How many reads should I test per ad?
Two or three. Generate the same script in two or three voices or two or three energy levels, then judge them the way the audience will meet them: muted first with captions, then with sound. The read that survives the muted pass is the one worth testing with spend.
Can I use AI voice in paid ads?
Yes, with the right pack. Ads are commercial by definition, so this is a Creator pack job: the $29 Creator pack adds commercial usage rights, and client work is covered by the same pack.
How long should an ad script be?
Budget by the second: a 15 second ad is about 40 words, a 30 second ad about 75 to 90, and a 60 second ad about 150 to 170. Write the hook as the first sentence, then keep the rest of the script to one idea.
Can one voice carry a whole ad campaign?
Yes, and it should. Pick the voice once and reuse it across every version and cutdown so the campaign has a recognizable sound. Voices are saved in the workspace, so later scripts and localizations read with the same cast.
What does an ad voiceover cost?
One credit covers about 1,000 characters. A 30 second ad is roughly 500 characters, so about one credit, and a ten-variant test batch of the same script lands around five credits, all inside the $9 Starter pack.
Related
- AI voice commercial use - what commercial usage rights cover at each pack.
- Languages hub - every language guide in one place, from Arabic to Polish.
- Fish Audio guides - the index of every workflow, tool and language on the site.