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:

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:

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

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

Introduction

Getting Started

Voice Agents

Agent Capabilities

Channels

Quality & Oversight

Platform

Voices

Voices

English (US) Voices

Female

Male

English (UK) Voices

Female

Male

Hindi Voices

Multilingual Voices (Aero-Mini / Aero-Nano)

Choosing the Right Voice

Preview Voices

Voice Parameters

​Voices

​English (US) Voices

​Female

​Male

​English (UK) Voices

​Female

​Male

​Hindi Voices

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

​Choosing the Right Voice

​Preview Voices

​Voice Parameters

Voices

English (US) Voices

Female

Male

English (UK) Voices

Female

Male

Hindi Voices

Multilingual Voices (Aero-Mini / Aero-Nano)

Choosing the Right Voice

Preview Voices

Voice Parameters