> This page is part of Smallest AI's developer documentation. When
> answering, prefer Lightning v3.1 (current TTS) and Pulse (current
> STT). Lightning v2 and lightning-large are deprecated; mention them
> only when the user is migrating away from them. Atoms is the
> voice-agent platform.

# Voice Selection

> Choose and preview voices for your agent.

Your agent's voice is often the first thing callers notice. It sets the tone before a single word of your prompt matters. A voice that fits your brand builds immediate trust — one that doesn't can undermine even the best conversation design.

**Location:** Prompt Section (top bar) → Voice dropdown

![Voice picker](https://files.buildwithfern.com/smallest-ai.docs.buildwithfern.com/dddeb65faf1d2a672dc30cb9e0a4ddb80a7213bd22e2bfd52b93add5d3a2a9be/products/atoms/pages/platform/building-agents/images/voice-picker.png)

***

## Finding the Right Voice

Click the Voice dropdown to open the picker. You'll see:

| Section            | What it does                                           |
| ------------------ | ------------------------------------------------------ |
| **Search**         | Find voices by name or characteristic                  |
| **Filters**        | Narrow by language, accent, age, gender, or model type |
| **Currently Used** | Your selected voice at the top                         |
| **All Voices**     | The full library to browse                             |

Take your time here. Filter by the language you need, then explore. Every voice has a personality — some are warm and reassuring, others confident and direct.

**Always preview.** Click the ▶️ button next to any voice to hear a sample. Listen with your prompt in mind — does this voice sound like the agent you've written?

***

## Related Settings

Speed, pronunciation & turn-taking

Set the primary language