A good explainer video needs two things working together: visuals that hold attention and a voiceover that carries the message.
The voiceover is the half that gets underestimated. Strong narration can lift an average animation; weak narration undermines a great one.
Here’s how to choose the right voice, record it properly, and avoid the mistakes that sink otherwise good videos.
Choosing the Right Voice
Listen to Samples
Start with demo reels, and listen against your actual footage rather than in isolation. A voice that sounds great alone can be completely wrong over your visuals.
Get the creative director or writer involved in the decision. They know the intended tone better than anyone, and casting is easier to get right as a conversation than as a solo judgement.
Voice Type
The right voice actor gets you to the right audience. Serious, authoritative, warm, energetic, wry — each reads differently to a viewer, and each suits a different message.
Decide what the video needs to feel like before you start listening, or you’ll be swayed by whoever has the best-produced demo.
Tone
Tone carries more than content does. The same script delivered warmly and delivered briskly are two different videos.
Match tone to the company and to how you want the audience to feel afterwards — reassured, energised, informed.
Gender
Worth considering deliberately rather than by default. Perception varies by audience and by category, and the safest approach is to test both against the actual script rather than assuming.
Match the Voice to the Brand
The voice should sound like the company. A playful, approachable brand suits an energetic delivery; a serious professional one suits something calmer and more measured.
That consistency matters across everything you produce. If your videos sound like they come from different companies, they undercut each other.
Cast Carefully
Once samples and tone have narrowed the shortlist, choose on capability. The right actor understands direction, delivers consistent takes, and can adjust without needing the whole session restarted.
Experience with explainer work specifically is worth prioritising. It’s a distinct skill from commercial or character work — the job is clarity under time pressure.
Recording Quality
Invest in the audio chain. Poor recording quality makes a video feel amateur regardless of how good the animation is, and viewers register it immediately even if they can’t name what’s wrong.
A condenser microphone is the standard choice for voice — sensitive and accurate. Pair it with a pop filter to control plosives and a treated space, or at minimum a soft-furnished one, to keep room reflection out of the recording.
Clean, clear audio is not a nice-to-have. It’s the baseline the rest of the video is judged against.
Three Voiceovers Worth Studying
Dropbox — sounds like a trusted friend explaining something useful. Approachable and functional, which is exactly the brand’s positioning.
Dollar Shave Club — confident, direct, and deliberately abrasive. It matches the company’s whole personality, and it would be disastrous for almost any other brand.
Slack — warm and collegial, like a colleague showing you a better way to work. Aimed precisely at professionals who want work to feel less grim.
The common thread: none of them is a generically “good” voice. Each is the right voice for that specific company.
Six Mistakes to Avoid
Treating Voice as an Afterthought
The voiceover carries the script, sets the emotional register, and paces the whole video. Plan it from the start rather than bolting it on after the animation is locked.
Prioritising Visuals Over Sound
Beautiful animation with poor audio feels broken. If budget is tight, protect the voiceover and recording quality before you protect animation complexity.
Choosing a Generic Voice
A safe, neutral, characterless read communicates nothing about who you are. A young technology company can afford wit; a luxury brand needs restraint. Neutral serves neither.
Ignoring Cultural Context
Tone and delivery read differently across markets. If the video is going international, check that the register lands as intended rather than assuming it travels.
Monotone Delivery
Flat delivery loses viewers regardless of what’s on screen. Variation in pace, emphasis, and pitch is what holds attention through ninety seconds of explanation.
Mismatched Pacing
Narration racing ahead of the visuals — or lagging behind them — is disorienting. Voice and picture need to be cut against each other, which is why the voiceover should be recorded before the animation is finalised, not after.
Worth doing: test more than one read. Different pacing and tone against the same visuals will show you which one holds attention, and the answer is often not the one you expected.
Conclusion
A good voiceover comes from knowing the audience, choosing a voice that fits the brand, writing a script that’s easy to speak aloud, recording it cleanly, and editing it against the picture.
Get those right and the narration does what it should: makes the message land and stay.
A strong voiceover can carry a modest video. A weak one wastes a good one.
Planning an explainer and thinking about casting? We’re happy to advise.