What Makes a Great Voiceover Demo? 7 Things I Listen For
- Keep Dreaming Creative
- 5 days ago
- 5 min read
I listen to a lot of voiceover demos. Some are beautifully recorded, many have great music and sound effects, and most feature actors who clearly have strong voices.
But a polished recording doesn’t automatically make a strong demo!
One of the biggest issues I hear is a commercial demo where every spot essentially has the same read. The scripts change. The music changes. The brands change. But the actor’s pacing, rhythm, emotional tone and overall delivery stay almost exactly the same. That doesn’t really show me range.
A strong commercial voiceover demo should feel like I’m hearing several different campaigns featuring the same actor, not one performance copied and pasted over several different pieces of stock music.
Here are some of the things I listen for when producing a commercial demo.
1. Your Reads Should Actually Sound Different
Range in a commercial demo doesn’t necessarily mean doing wildly different voices.
It can be much more subtle than that.
Maybe one spot is warm and intimate. Another is dry and understated. Another has more confidence and authority. One might have a little comedic timing, while another has more emotional sincerity. A high-energy spot may need a completely different rhythm than a relaxed lifestyle read.
The pacing should change. The rhythm should change. The emotional stakes should change. Even the way you use silence should change! If every spot lives in exactly the same vocal placement and cadence, changing the music underneath it isn’t going to create variety.
This is one of the reasons direction is such an important part of demo production.
Sometimes an actor has significantly more range than they realize, but somebody needs to help pull those different performances out of them.
2. Microphone Proximity Is Part of the Performance
This is something I don’t hear discussed nearly enough.
Not every commercial should be performed from exactly the same position in front of the microphone.
Some reads are meant to feel incredibly personal. Maybe it sounds like you’re talking quietly to one person sitting right beside you. Those spots can benefit from a closer, more intimate relationship with the mic.
Other commercials need more projection, energy or physicality. The actor may naturally open up, move back slightly and allow the performance to feel bigger.
That contrast matters.
If an entire demo is recorded from exactly the same proximity with exactly the same vocal intensity, it can contribute to that feeling that every commercial sounds alike.
The microphone isn’t simply there to capture the performance. How you work the microphone can become part of the performance itself.
3. The Scripts Need to Fit Your Voice
This may be one of the most important parts of the entire process. Not every good commercial script is a good demo script for every actor. I sometimes hear demos with copy that simply doesn’t complement the person reading it.
Maybe the actor sounds naturally sophisticated and grounded, but the demo is filled with quirky millennial lifestyle copy. Or someone with a wonderfully approachable everyday sound has been given scripts that continually push them toward a polished announcer read.
You shouldn’t be trying to prove that you can somehow fit yourself into every possible commercial. The copy should help show where your voice is already marketable.
That requires understanding the actor, but it also requires understanding the industry.
When I’m putting together a demo, I’m thinking about where that voice could realistically live in the current advertising landscape. What kinds of brands could I hear this person representing? Where does their natural sound fit? What qualities should we emphasize?
At Keep Dreaming Creative, every demo script is written specifically for the actor recording it. We don’t recycle the same collection of demo scripts from actor to actor.
We also write with the current advertising cycle in mind. Advertising, language, and performance trends change. The way commercials were written and voiced several years ago may not reflect what you’re hearing today.
If I’m producing your demo in 2026, I don’t want it to sound like it was written in 2019!
4. Music Should Support the Spot, Not Be the Spot
Another thing I hear frequently is a collection of voice recordings with seemingly random stock music placed underneath them. There’s nothing inherently wrong with stock music, but production can't stop there.
Each commercial should feel like its own little world.
The music, pacing, sound design and edit should complement the tone of the performance and help establish the kind of campaign we’re supposed to be hearing.
A heartfelt healthcare spot shouldn’t feel produced the same way as a playful food commercial. A sleek automotive read shouldn’t live in the same sonic universe as a quirky social media campaign.
Production should support the actor without distracting from them. Ultimately, I still want to hear you.
5. Get Rid of the Empty Space
This is a small editing detail that can make a surprisingly big difference.
I hear demos where a music bed plays for several seconds before the actor starts talking. Then the voice stops, and the music continues playing again before the next spot begins.
That space might make sense in a full-length commercial, but it often isn’t helping your demo. When someone presses play, I want them hearing the actor almost immediately.
The same applies between spots. Long musical transitions or extended fades can take up valuable space without telling me anything more about the performer. The voice should be the focus.
6. But Don't Cut It So Tightly That the Demo Can't Breathe
There’s another side to this. You can absolutely over-edit a demo.
I’ve heard reels where every spot is packed so tightly against the next one that the listener barely has time to process what they just heard.
One big sound ends and another immediately attacks you. Then another, then another.
Even if every individual performance is strong, the overall demo can become exhausting to listen to. The trick is finding the balance.
I want to eliminate unnecessary empty space while still giving each spot just enough room to land. Sometimes half a beat makes all the difference!
A good demo should feel energetic and efficient, but it shouldn’t feel like you're being chased through it.
7. Your Demo Should Sound Like You, on a Really Good Day
I don't think the goal of a demo is to create some completely manufactured version of your voice.
I want to hear what makes your voice interesting. Maybe you have fantastic comedic instincts. Maybe there’s a natural warmth to your read. Maybe you sound effortlessly authoritative. Maybe you have an unusual texture, an incredible ability to sound intimate on the microphone or a really contemporary conversational rhythm.
Those are the things I want to build around. The writing, direction and production should all be working together to showcase those strengths.
A great commercial demo isn’t simply a collection of commercials. It’s a carefully constructed introduction to you as a voice actor.
And when everything is working together — the right scripts, genuinely different performances, thoughtful mic technique, strong direction, current commercial styles and production that gives the voice room to shine — you can hear the difference.
What's Next: Animation Demos
Commercial demos are only one part of the conversation.
Animation demos require an entirely different approach, especially when it comes to developing characters that are distinct enough from one another while still showcasing believable acting.
I’ll be breaking that process down in an upcoming series, including how I approach character creation, vocal placement, acting choices, contrast between characters and choosing which voices actually belong on an animation demo - stay "tooned!"
