> ## Documentation Index > Fetch the complete documentation index at: https://www.bolna.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # Configure Voice and Transcription Settings > Set up speech-to-text and text-to-speech for Bolna Voice AI agents. Choose providers like Deepgram and ElevenLabs, and fine-tune voice quality. ## What is the Audio Tab? The Audio Tab is where you configure how your agent listens and speaks. Set up language preferences, choose transcription providers for speech-to-text, and select voice synthesizers for natural-sounding responses. Audio Tab showing language, speech-to-text, and text-to-speech configuration *** ## Configuration Options ### Configure Language Set your agent's primary language and enable multilingual support. Configure Language section with language dropdown and Auto language switch toggle Choose primary language (English, Hindi, Spanish, etc.) Automatically detect and switch languages during calls Enable **Auto Language Switch** for multilingual support. Your agent will detect the caller's language and respond accordingly. *** ### Speech-to-Text (Transcription) Configure how your agent converts spoken words into text. Speech-to-Text section showing Provider dropdown, Model selection, and Keywords field Choose your transcription provider (e.g., Deepgram, Azure). Pick the model (e.g., `nova-3` for best accuracy). Boost recognition of specific terms like names or brand words. **Keywords help accuracy!** Add names, brand terms, or technical words with boost values. Format: `word:boost_value` (e.g., `Bruce:100`). *** ### Text-to-Speech (Voice) Configure how your agent sounds with voice synthesis settings. Text-to-Speech section showing Provider, Model, Voice selection, and voice tuning sliders Choose your voice synthesis provider (e.g., ElevenLabs, Azure). Pick the model (e.g., `eleven_turbo_v2_5` for low latency). Select a specific voice. Click ▶️ to preview! Click **"Add voices"** to import or clone custom voices for a unique brand experience. *** ### Voice Tuning Fine-tune your agent's voice quality with these settings. | Setting | Description | Recommended | | ---------------------- | ------------------------------- | ------------------------------------ | | **Buffer Size** | Audio buffering before playback | 200 (balance of quality and speed) | | **Speed Rate** | Speaking speed | 1.0 (natural pace) | | **Similarity Boost** | Voice matching accuracy | 0.75 (close to original voice) | | **Stability** | Voice consistency | 0.5 (balanced expression) | | **Style Exaggeration** | Voice characteristics | 0 (neutral, increase for expressive) | **Balance is key!** High buffer size improves quality but increases latency. Test different settings to find the right balance for your use case. *** ## Next Steps Configure prompts and welcome message Configure transcription and latency Create custom voice clones Learn about transcription options Built with [Mintlify](https://mintlify.com).