Here's a mistake developers and creators make constantly: they pick a voice by reading its name in a dropdown, generate a few thousand lines of audio, and then realize it sounds completely wrong for their project.
Too stiff. Too casual. Wrong energy for the brand. Doesn't match the vibe of the content.
Starting over is expensive — in time, money, and motivation.
LeanVox's Voice A/B Tester exists to stop that mistake before it happens. Enter your actual text, hear two curated voices side by side, vote, then reveal which voice you preferred.
#The Taste Test Before You Buy
Think of it like a wine flight, but for AI voices.
You wouldn't order a case of wine without tasting it. You shouldn't generate thousands of lines of audio without hearing the voice on your content first.
The A/B Tester is exactly that: a low-commitment way to compare two curated voices on the exact script you're planning to use. Not a demo clip. Not a generic sample sentence. Your words, your tone, your use case.
#How It Works
- Enter your text — use something representative of your actual project, up to 300 characters
- Generate a blind pair — LeanVox picks two curated Standard voices
- Play both clips — hear both rendered side by side
- Vote A, B, or Tie — then reveal the voice names
No account required for three anonymous comparisons per IP per day.
#Available Voices
| Voice | Character |
|---|---|
| Heart (Female) | Warm, natural, versatile |
| Bella (Female) | Clear, expressive, engaging |
| Michael (Male) | Confident, professional |
| Adam (Male) | Grounded, conversational |
#Real Use Cases
Podcast producers — Should your intro sound warm, bright, professional, or grounded? Run a short intro script and listen before committing.
Audiobook narrators and publishers — Test a representative paragraph before picking a narration direction — pacing and tone matter at scale.
Game developers — Character voices are everything. Test multiple voices on the same line of dialogue to nail the personality before you generate hundreds of lines of NPC audio.
Brand teams — Your brand voice is part of your brand. Hear it before you ship it. Differences that look subtle in a description are often obvious in your ears.
App developers — If you're integrating TTS via the LeanVox API, test voices against your actual UI copy before hardcoding a voice ID. Your users will thank you.
#Why This Saves You Money
Here's the math: if you're building a 2-hour audiobook, the total cost is manageable. But if you pick the wrong voice and re-generate everything? You've just doubled the cost — and the time.
The anonymous tester is intentionally capped, but still enough to try a few short scripts before opening the full playground.
#Ready to Build After You Choose?
- LeanVox API docs — integrate TTS directly into your app or pipeline
- Get an API key — free account gets you 200+ minutes, no credit card needed
- PDF to Audio tool — if you need to convert documents, not just raw text
#Hear Before You Commit
Two minutes of testing now saves hours of regret later.
Try the Voice A/B Tester free at leanvox.com/tools/voice-ab-tester
No login required for the first few capped comparisons. Drop in your text, listen, vote, and reveal the voice names.