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

# Voices

> Browse all 90+ Aero TTS voices across 20+ languages — with gender, language, and model filters.

# Voices

Aero TTS includes 90+ built-in voices across 20+ languages. Each voice is optimized for conversational speech with natural prosody and emotion.

## English (US) Voices

### Female

| Voice ID     | Name  | Description                             |
| ------------ | ----- | --------------------------------------- |
| `aero-vayu`  | Vayu  | Warm, professional — most popular voice |
| `aero-ira`   | Ira   | Elegant, composed                       |
| `aero-zara`  | Zara  | Confident, articulate                   |
| `aero-aria`  | Aria  | Friendly, approachable                  |
| `aero-priya` | Priya | Bright, energetic                       |
| `aero-nova`  | Nova  | Modern, versatile                       |
| `aero-luna`  | Luna  | Calm, soothing                          |
| `aero-kore`  | Kore  | Clear, precise                          |
| `aero-river` | River | Natural, flowing                        |
| `aero-alloy` | Alloy | Strong, distinct                        |
| `aero-aoede` | Aoede | Melodic, expressive                     |

### Male

| Voice ID      | Name   | Description            |
| ------------- | ------ | ---------------------- |
| `aero-kian`   | Kian   | Deep, authoritative    |
| `aero-atlas`  | Atlas  | Smooth, confident      |
| `aero-echo`   | Echo   | Warm, conversational   |
| `aero-eric`   | Eric   | Clear, professional    |
| `aero-fenrir` | Fenrir | Bold, commanding       |
| `aero-liam`   | Liam   | Friendly, approachable |
| `aero-onyx`   | Onyx   | Rich, resonant         |
| `aero-puck`   | Puck   | Light, energetic       |

## English (UK) Voices

### Female

| Voice ID        | Name     | Description                   |
| --------------- | -------- | ----------------------------- |
| `aero-emma`     | Emma     | Classic British, professional |
| `aero-lily`     | Lily     | Warm, welcoming               |
| `aero-alice`    | Alice    | Clear, precise                |
| `aero-isabella` | Isabella | Refined, elegant              |

### Male

| Voice ID      | Name   | Description                    |
| ------------- | ------ | ------------------------------ |
| `aero-george` | George | Distinguished, authoritative   |
| `aero-lewis`  | Lewis  | Modern British, conversational |
| `aero-daniel` | Daniel | Warm, reliable                 |
| `aero-fable`  | Fable  | Storytelling, expressive       |

## Hindi Voices

| Voice ID        | Name     | Gender | Description                                                 |
| --------------- | -------- | ------ | ----------------------------------------------------------- |
| `aero-ananya`   | Ananya   | Female | Clear, professional Hindi                                   |
| `aero-kavya`    | Kavya    | Female | Warm, conversational Hindi                                  |
| `aero-dev`      | Dev      | Male   | Strong, authoritative Hindi                                 |
| `aero-arjun`    | Arjun    | Male   | Friendly, approachable Hindi                                |
| `aero-rohan`    | Rohan    | Male   | Conversational Hindi — built for BPO and call-center agents |
| `aero-neha`     | Neha     | Female | Polite, professional female receptionist                    |
| `aero-ashobini` | Ashobini | Female | Polite female receptionist (Bengali speaker)                |
| `aero-sourabh`  | Sourabh  | Male   | Young, enthusiastic male                                    |
| `aero-amaira`   | Amaira   | Female | Warm, friendly conversational woman                         |
| `aero-pooja`    | Pooja    | Female | Polite female customer-support agent                        |

## Multilingual Voices (Aero-Mini / Aero-Nano)

The `aero-mini` and `aero-nano` models support additional languages including Spanish, French, German, Italian, Chinese, Japanese, Korean, and Portuguese. Use the voices endpoint to discover all available voices:

```bash theme={null}
curl https://api.thinnest.ai/api/tts/voices?language=es \
  -H "Authorization: Bearer YOUR_API_KEY"
```

## Choosing the Right Voice

| Use Case                       | Recommended Voice                      | Why                                                   |
| ------------------------------ | -------------------------------------- | ----------------------------------------------------- |
| Customer support               | `aero-vayu` (F) or `aero-kian` (M)     | Warm, professional, builds trust                      |
| Sales calls                    | `aero-atlas` (M) or `aero-zara` (F)    | Confident, persuasive                                 |
| Appointment reminders          | `aero-aria` (F) or `aero-liam` (M)     | Friendly, clear                                       |
| IVR / phone menus              | `aero-eric` (M) or `aero-kore` (F)     | Precise, easy to understand                           |
| Indian market (Hindi)          | `aero-ananya` (F) or `aero-dev` (M)    | Native Hindi speakers                                 |
| BPO / Indian call center       | `aero-rohan` (M)                       | Tuned for conversational Hindi customer-support flows |
| Reception / front desk (Hindi) | `aero-neha` (F) or `aero-ashobini` (F) | Polite, professional reception greetings              |
| British English                | `aero-emma` (F) or `aero-george` (M)   | Authentic British accent                              |
| Storytelling / narration       | `aero-fable` (M) or `aero-aoede` (F)   | Expressive, engaging                                  |

## Preview Voices

You can preview any voice in the **Aero TTS Playground** in your dashboard, or via the API:

```bash theme={null}
curl -X POST https://api.thinnest.ai/api/tts/synthesize \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "text": "Hello! This is a preview of the Aero Vayu voice.",
    "voice": "aero-vayu",
    "model": "aero",
    "format": "mp3"
  }' \
  --output preview.mp3
```

## Voice Parameters

Fine-tune voice output with these parameters:

| Parameter     | Range                               | Default | Description               |
| ------------- | ----------------------------------- | ------- | ------------------------- |
| `speed`       | 0.5 - 2.0                           | 1.0     | Playback speed multiplier |
| `format`      | mp3, wav, pcm, opus, ogg, flac, aac | mp3     | Output audio format       |
| `sample_rate` | 8000 - 48000                        | 22050   | Audio sample rate in Hz   |

```bash theme={null}
curl -X POST https://api.thinnest.ai/api/tts/synthesize \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "text": "Speaking a bit faster now.",
    "voice": "aero-vayu",
    "model": "aero",
    "speed": 1.3,
    "format": "wav",
    "sample_rate": 44100
  }' \
  --output fast.wav
```