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←BACK TO BLOG /Agent Building... / /Vapi x Deepgram Aura-2 — The Most Natural TTS for Enterprise Voice AI

Vapi x Deepgram Aura-2 — The Most Natural TTS for Enterprise Voice AI

Vapi x Deepgram Aura-2  — The Most Natural TTS for Enterprise Voice AI
Yoshita Agrawal • Apr 15, 2025
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Yoshita Agrawal • Apr 15, 20252 min read
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Aura-2, Deepgram’s newest text-to-speech model, is now live on Vapi.

Whether you’re building outbound sales agents, AI-powered IVRs, or real-time healthcare assistants, Aura-2 delivers the voice quality, pronunciation accuracy, and latency performance you need.

Most TTS models today sound impressive, but the small things give them away. Unnatural pacing, awkward pauses, or subtle mispronunciations still make them feel robotic, especially in high-stakes, real-world interactions.

Why Aura-2 Is Different

🎯 Trained on Conversations, Not Just Text
Unlike traditional TTS models that are trained on clean scripts or narration, Aura-2 was trained on human-to-human conversational data. The result? Voices that respond like people—with context, tone, and intent.

🧪 Enterprise-First Testing Approach
Aura-2 was evaluated across real-world domains like healthcare, finance, logistics, and support. It’s built to perform where precision matters most.

📈 Pronunciation Accuracy that Scales
From alphanumerics to drug names and complex brand terms, Aura-2’s pronunciation engine has been fine-tuned for reliability, especially in verticals where clarity is non-negotiable.

⚡ Real-Time, Low-Latency Performance
With time-to-first-byte under 150ms, Aura-2 supports smooth, conversational experiences at scale. Perfect for dynamic use cases like sales calls or appointment scheduling.

🧠 Expressive, Context-Aware Speech
Human-like pauses, emotional tone, and adaptive pacing make Aura-2 feel like a real person, not just a text reader.


Use Cases We’re Seeing

  • Voice agents for customer support and sales
  • AI front desks and healthcare scheduling
  • Interactive voice menus and automated fulfillment
  • Internal productivity bots with a human touch

How to Get Started

If you’re already on Vapi, switch your TTS provider to deepgram-aura-2 in your config. No extra integration work needed. You can start making calls with Aura-2 today.

Using your own Deepgram credentials? You’re good to go as long as you’re on their latest API version.


P.S. Yes, Aura-2 pauses correctly before saying “1-844-HEY-VAPI.” It even makes it sound friendly. 🎧

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