Configure Persona

The Persona tab allows you to configure your agent’s character, vocal expression, and linguistic capabilities. Here you pair the brain (LLM) with ultra-low-latency hearing (STT) and expressive vocal speech engines (TTS).

Persona Configuration Tab in Vaani Dashboard

Video Walkthrough

1. Ears (Speech-to-Text / STT)

The STT engine determines how accurately and quickly your agent hears caller speech over cellular or VoIP telephone connections.

Primary Provider
Fallback Provider
Keyword Boosting

We recommend Deepgram Nova-2 for real-time conversational telephony:

Latency: Sub-200ms streaming transcription.
Acoustic Robustness: Handles background traffic, static, and speakerphone echoes gracefully.
Multilingual Support: Supports Indian English, Hindi, and regional dialects.

2. Brain (Large Language Model)

Configure the intelligence engine driving conversational decisions:

Parameter	Recommended Setting	Description
Model	`GPT-4o`, `Claude 3.5 Sonnet`, `Llama 3.3 70B`	Select the model architecture best suited to your task complexity
Temperature	`0.2` – `0.5`	Lower values ensure factual, consistent answers; higher values produce creative, relaxed dialog
Max Tokens	`80` – `150`	Limits turn length to prevent the agent from delivering unnaturally long monologues

3. Mouth (Text-to-Speech / TTS)

Select the vocal personality that reflects your brand:

Sarvam Bulbul:v3: Exceptional naturalness for Indian accents, Hindi, Marathi, Tamil, and Hinglish.
ElevenLabs Multilingual v2: High-definition expressive emotional voices.
Deepgram Aura: Ultra-low time-to-first-byte (TTFB) for lightning-fast turn-taking.

Pronunciation Dictionaries

Synthetic voices occasionally mispronounce specialized words, brand names, or abbreviations. You can provide explicit phonetic respellings:

{
  "Vaani": "VAA-nee",
  "Aangan": "AAN-gun",
  "Pune": "POO-nay",
  "cURL": "see-url"
}

4. Voice Lab Integration

Want to test custom voice clones or audition different voice actors before assigning them to your agent? Head over to the Voice Lab to clone your own voice or audition pre-licensed voice actors.

Get Started

Create an Agent

Configuring Your Agent

Telephony & Studio

Guides & Capabilities

Configure Persona

Video Walkthrough

1. Ears (Speech-to-Text / STT)

2. Brain (Large Language Model)

3. Mouth (Text-to-Speech / TTS)

Pronunciation Dictionaries

4. Voice Lab Integration

Next Steps

Training & Knowledge Base

Experience Tuning

​Video Walkthrough

​1. Ears (Speech-to-Text / STT)

​2. Brain (Large Language Model)

​3. Mouth (Text-to-Speech / TTS)

​Pronunciation Dictionaries

​4. Voice Lab Integration

​Next Steps

Training & Knowledge Base

Experience Tuning

Video Walkthrough

1. Ears (Speech-to-Text / STT)

2. Brain (Large Language Model)

3. Mouth (Text-to-Speech / TTS)

Pronunciation Dictionaries

4. Voice Lab Integration

Next Steps