Voice design best practices

Hey Emre, we’ve worked with thousands of companies deploying voice agents.

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Hey Emre,
 
At Cartesia, we’ve worked with thousands of companies deploying voice agents. We’ve found that voice design is the biggest driver
of engagement and ROI.
 
So how do you create the perfect voice? Here’s the process we recommend:
 
1. Define your ideal voice
Start by defining the ideal end-user experience based on your use case and industry. For example:
➤ Outbound sales: Warm, emotive voices consistently book more meetings
➤ Customer support: Calm, steady voices with slight background noise create a more “human” feel
➤ In consumer apps: Younger, energetic voices boost session length and engagement
 
2. Explore & fine-tune
Use keywords to explore the 500+ voices in our library. Add SSML tags to control speed, volume, and emotion. Test with a
transcript snippet that fits your use case.
 
3. Or use an existing voice
Clone any voice with just 5 seconds of audio: see our guide
[https://docs.cartesia.ai/build-with-cartesia/capability-guides/clone-voices]. Cartesia's clones preserve accents, tones, and even
background. Upgrade to access Pro Voice Cloning.
 
4. Find your winner
Test your shortlist against your key metric (conversion rate, CSAT, session length, etc) using our API. Lock in the voice that
performs best!
 

Choose Your Voice [https://play.cartesia.ai/voices]

 
Want specialized support for your specific product and use case? Consider working directly with our experts who've deployed
thousands of custom voices across industries - simply reply to this email.
 
Happy building!
Karan
 
 
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nse/cartesia/2026-10-21/4725

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Karan at Cartesia · karan@mail.cartesia.ai

Sent

21 October 2026 · 21:00 UTC