Can I use an AI voice for a radio commercial?
Yes. Commercial use of the audio you create on Speechma is included, so you can use it in radio spots, streaming audio ads and podcast ad reads, as long as you own the rights to the script, music and any brand names you use. Radio is audio only, so the voice and script carry the whole message. That is why a well-written script and the right voice matter more than anything else.
AI voiceover is also a great way to test. Agencies use it to produce “scratch” versions of a spot so clients can hear the ad before approving a final production, and small businesses use it to air spots on local stations and streaming audio without studio costs.
How many words fit in a radio ad?
At a natural ad-read pace, plan for about 2.3–2.6 words per second. Leave room for music and a pause before the call to action.
| Spot length | Approximate words | Best for |
|---|---|---|
| 15 seconds | 30–38 words | Reminders, sale dates, brand tag |
| 30 seconds | 65–80 words | Most local ads: one offer, one call to action |
| 60 seconds | 130–155 words | Storytelling, dialogue, multiple benefits |
| Podcast host-style read | 150–200 words | Conversational sponsor segments |
Generate the spot and check the clip length. If it runs long, cut words rather than speeding the voice up too much.
Radio ad scripts you can adapt
30-second local business spot
When your AC quits in the middle of a Phoenix summer, you don’t want to wait three days. You want [Desert Breeze Heating and Air]. Our technicians are on call seven days a week, and most repairs are done the same day. Family owned since [nineteen ninety-eight]. Call [six oh two, five five five, zero one four four], or book online at [desertbreeze dot com]. [Desert Breeze]: cool comes fast.
15-second sale reminder
This weekend only at [Miller’s Furniture]: thirty percent off every sofa in the store. Saturday and Sunday, on Route nine in [Danbury]. [Miller’s]: home starts here.
60-second dialogue opener (two voices)
Voice A: Honey, why is there a goat in our backyard?
Voice B: I told you. The lawn mower broke.
Voice A: So you rented a goat?
Announcer: There’s a better way. [Green Acres Equipment] has mowers starting today…
For dialogue spots, generate each character with a different voice and join the clips in your editor. Only include prices, guarantees and claims you can stand behind.
How to produce a radio spot with Speechma
- Write to timeUse the word counts above. Put the business name early and repeat it at the end. Write phone numbers and web addresses exactly as they should be spoken.
- Choose and tune the voicePreview a few voices. Adjust speed and pitch, and use commas, semicolons and exclamation points to shape emphasis.
- Generate and downloadEnter the 5-digit code and download the MP3. Make an alternate take with a different voice for the client to compare.
- Mix with musicCreate an original bed with the AI Music Generator. Keep music well under the voice, and end on a clean tag line.
- Deliver to the stationExport at the exact length the station or platform asks for (for example 30.0 seconds) in their required format, often MP3 or WAV, and name the file with the advertiser and spot length.
Radio voiceover dos and don’ts
- Do stick to one idea per spot. Radio listeners are driving, cooking or working; they remember one offer, not five.
- Do repeat the phone number or web address, and keep it simple to remember.
- Do match the voice to the audience: a friendly neighbor for local services, an energetic announcer for car dealership sales.
- Don’t speed the voice up to cram in legal copy. Shorten the script or move fine print to your website.
- Don’t imitate celebrities or well-known radio personalities. Use a library voice or one built with Voice Design.
- Don’t skip the station’s specs. Every outlet has its own length and file requirements.
Agencies and ad platforms
Agencies producing many scratch spots and versions can work faster on SpeechmaPRO.com, with no captcha or ads. Audio ad platforms that build spots automatically can use the Speechma API from $9/month.
Frequently asked questions
Is the radio ad voiceover generator free?
Can I air Speechma voices on broadcast radio?
How many words are in a 30-second radio ad?
Can I make a radio ad with two voices?
What file format do radio stations need?
Can I make the ad in Spanish for Hispanic radio?
Make better voiceovers, faster
- New voices and features the day they launch
- Script templates and tricks that make AI voices sound human
- Creator stories, community picks and early access
