> ## Documentation Index
> Fetch the complete documentation index at: https://docs.chatzy.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Voice

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### The Voice Tab

The **Voice** tab shapes how your AI agent *sounds* and *listens* - defining its entire auditory experience. Here, you control how it understands speech, responds with lifelike audio, and maintains a natural flow during calls or voice interactions.

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#### Language

This determines the language and accent your voice agent will use for both listening and speaking.

* **Language**: Choose the specific language and regional dialect (e.g., **English (India)**). This ensures the agent correctly interprets user speech and responds in a matching tone and vocabulary.

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#### Speech-to-Text (Input)

This section governs how the agent **hears** and **understands** the user. The system uses a transcriber to convert spoken words into text before processing them through the AI model.

* **Select Transcriber**: Choose the Speech-to-Text engine that best suits your application.
  * **Provider**: The technology provider offering the transcription service (e.g., **Deepgram**).
  * **Model**: The specific transcriber model version (e.g., **nova-3**), determining how quickly and accurately speech is converted to text.

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#### Text-to-Speech (Output)

This defines how the agent **speaks** back to the user. The selected voice synthesizer turns the AI’s text responses into natural-sounding speech.

* **Select Voice**: Pick the **Text-to-Speech (TTS)** engine and voice that matches your brand’s style.
  * **Provider**: The TTS service powering the audio output (e.g., **ElevenLabs**).
  * **Model / Voice**: The specific voice profile or tone you want the agent to use (e.g., **Jeevan – Expressive Indian Voice**).

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#### Audio Delivery Fine-Tuning

Fine-tune how your agent sounds during conversations - balancing clarity, timing, and natural flow.

* **Speed Rate**: Controls how fast or slow your agent speaks. Adjust the slider to match your preferred pace (default is **1**).
* **Buffer Size**: Controls how much audio is preloaded before playback. A higher buffer size results in **smoother long responses**, but may introduce a **slight delay** before speech begins.