Models Overview

Choose the right model for your text-to-speech needs.

Available Models

YourVoic offers 5 TTS models, each optimized for different use cases:

Model	Latency	Quality	Languages	Voices	Expressions	Credit Cost
`aura-lite`	Fast	Good	90+	1000+ Aura voices	Yes	1 credit/char
`aura-prime`	Medium	Excellent	90+	1000+ Aura voices	Yes	1 credit/char
`aura-max`	Slower	Premium	90+	1000+ Aura voices	Yes	1 credit/char
`rapid-flash`	Fastest	Good	18	62 voices	No	1 credit/char
`rapid-max`	Fast	Very Good	41	30 Aura voices	No	2 credits/char

Two distinct voice sets

Aura voices (Peter, Kylie, Rahul, Deepika…) work with aura-lite, aura-prime, aura-max, and rapid-max. (Jacob, Emma, Arjun, Ananya…) are exclusive to rapid-flash. Always fetch voices for your chosen model using ?model=.

Prosody support reminder

If your workflow depends on explicit speed or pitch controls, Rapid models are the safest choice. Aura models focus on natural speech quality; their streaming path does not support pitch.

Model Details

Aura Lite

Our fastest Aura model, optimized for real-time applications.

Best for: Chatbots, voice assistants, real-time apps
Features: Expression tags, 90+ languages, 1000+ Aura voices
Voice set: Aura voices — fetch with ?model=aura-lite

response = requests.post(
    "https://yourvoic.com/api/v1/tts/generate",
    headers={"X-API-Key": "your_api_key"},
    json={
        "text": "Quick response for real-time chat.",
        "voice": "Peter",
        "language": "en-US",
        "model": "aura-lite"
    }
)

Aura Prime

Balanced model with excellent quality and reasonable speed.

Best for: General purpose, e-learning, presentations
Features: Expression tags, enhanced prosody, 1000+ Aura voices
Voice set: Aura voices — fetch with ?model=aura-prime

response = requests.post(
    "https://yourvoic.com/api/v1/tts/generate",
    headers={"X-API-Key": "your_api_key"},
    json={
        "text": "Professional quality for your content.",
        "voice": "Peter",
        "language": "en-US",
        "model": "aura-prime"
    }
)

Aura Max

Premium quality model for professional content.

Best for: Audiobooks, professional voiceovers, media production
Features: Highest quality, natural prosody, expression tags, 1000+ Aura voices
Voice set: Aura voices — fetch with ?model=aura-max

response = requests.post(
    "https://yourvoic.com/api/v1/tts/generate",
    headers={"X-API-Key": "your_api_key"},
    json={
        "text": "Premium audiobook quality narration.",
        "voice": "Peter",
        "language": "en-US",
        "model": "aura-max"
    }
)

Rapid Flash

Ultra-fast model using a dedicated Neural voice engine for lowest latency applications.

Best for: IVR systems, notifications, high-volume processing
Voice set: 62 voices (Jacob, Emma, Arjun, Ananya…) — exclusively for this model
Limitation: Only 18 languages supported; no expression tags

response = requests.post(
    "https://yourvoic.com/api/v1/tts/generate",
    headers={"X-API-Key": "your_api_key"},
    json={
        "text": "Ultra-fast response.",
        "voice": "Jacob",
        "language": "en-US",
        "model": "rapid-flash"
    }
)

Rapid Max

Fast model combining the Aura voice set with speed optimizations.

Best for: Balance of speed and quality across many languages
Features: 41 languages, 30 voices, speed and pitch control
Voice set: Aura voices — fetch with ?model=rapid-max

response = requests.post(
    "https://yourvoic.com/api/v1/tts/generate",
    headers={"X-API-Key": "your_api_key"},
    json={
        "text": "Fast with great quality.",
        "voice": "Peter",
        "language": "en-US",
        "model": "rapid-max"
    }
)

Fetching Voices per Model

Always use ?model= when fetching the voice list to get the correct set for your chosen model:

# Aura voices for aura-prime (English names)
curl "https://yourvoic.com/api/v1/voices?model=aura-prime&language=en-US" \
  -H "X-API-Key: YOUR_API_KEY"

# Aura voices for aura-prime (Hindi names)
curl "https://yourvoic.com/api/v1/voices?model=aura-prime&language=hi" \
  -H "X-API-Key: YOUR_API_KEY"

# Neural voices for rapid-flash
curl "https://yourvoic.com/api/v1/voices?model=rapid-flash" \
  -H "X-API-Key: YOUR_API_KEY"

# Aura voices for rapid-max
curl "https://yourvoic.com/api/v1/voices?model=rapid-max&language=en-US" \
  -H "X-API-Key: YOUR_API_KEY"

Choosing the Right Model

Use Case	Recommended Model	Why
Voice Assistant	`aura-lite`	Fast response, expression support
Audiobooks	`aura-max`	Premium quality, natural prosody
E-learning	`aura-prime`	Clear speech, balanced quality
IVR / Phone Systems	`rapid-flash`	Lowest latency
Notifications	`rapid-flash`	Fast and cost-effective
Video Narration	`aura-max`	Professional quality
Chatbots	`aura-lite`	Real-time with expressions
Batch Processing	`rapid-max`	Good speed/quality balance at volume

Previous ← Real-time Streaming Next Voice Library →

Models Overview (V2)

Choose the right AI model for your text-to-speech needs.

Available Models

YourVoic offers 5 TTS models, each optimized for different use cases:

Model	Latency	Quality	Languages	Expressions	Control Notes	Credit Cost
`aura-lite`	Fast	Good	90+	Yes	Streaming speed supported; streaming pitch unavailable. Generate controls are conservative in the playground.	1 credit/char
`aura-prime`	Medium	Excellent	90+	Yes	Streaming speed supported; streaming pitch unavailable.	1 credit/char
`aura-max`	Slower	Premium	90+	Yes	Best natural quality; streaming pitch unavailable.	1 credit/char
`rapid-flash`	Fastest	Good	18	No	Supports speed and pitch in standard generation and pseudo-streaming.	1 credit/char
`rapid-max`	Fast	Very Good	41	No	Generate supports speed and pitch; streaming supports speed only.	2 credits/char

Prosody support reminder

If your workflow depends on explicit speed or pitch controls, Rapid models are the safest choice. Aura models focus first on natural speech quality and accent guidance, and their streaming path does not support pitch.

Model Details

Aura Lite

Our fastest Aura model, optimized for real-time applications.

Best for: Chatbots, voice assistants, real-time apps
Latency: ~200ms first byte
Features: Expression tags, all languages, all voices

response = requests.post(
    "https://yourvoic.com/api/v1/tts/generate",
    headers={"X-API-Key": "your_api_key"},
    json={
        "text": "Quick response for real-time chat.",
        "voice": "Peter",
        "model": "aura-lite"
    }
)

Aura Prime

Balanced model with excellent quality and reasonable speed.

Best for: General purpose, e-learning, presentations
Latency: ~400ms first byte
Features: Expression tags, enhanced prosody

response = requests.post(
    "https://yourvoic.com/api/v1/tts/generate",
    headers={"X-API-Key": "your_api_key"},
    json={
        "text": "Professional quality for your content.",
        "voice": "Peter",
        "model": "aura-prime"
    }
)

Aura Max

Premium quality model for professional content.

Best for: Audiobooks, professional voiceovers, media production
Latency: ~800ms first byte
Features: Highest quality, natural prosody, expression tags

response = requests.post(
    "https://yourvoic.com/api/v1/tts/generate",
    headers={"X-API-Key": "your_api_key"},
    json={
        "text": "Premium audiobook quality narration.",
        "voice": "Peter",
        "model": "aura-max"
    }
)

Rapid Flash

Ultra-fast model for lowest latency applications.

Best for: IVR systems, notifications, high-volume processing
Latency: ~100ms first byte
Limitation: Only 18 languages supported

Rapid Flash Language Support

Only these 18 languages: Danish, German, English (Australia), English (UK), English (India), English (US), Spanish (Spain), Spanish (US), Filipino, French (Canada), French (France), Hindi, Italian, Japanese, Korean, Portuguese (Brazil), Thai, Vietnamese

response = requests.post(
    "https://yourvoic.com/api/v1/tts/generate",
    headers={"X-API-Key": "your_api_key"},
    json={
        "text": "Ultra-fast response.",
        "voice": "Peter",
        "language": "en-US",
        "model": "rapid-flash"
    }
)

Rapid Max

Fast model with better quality than Rapid Flash.

Best for: Balance of speed and quality
Latency: ~150ms first byte
Features: All 50+ languages, good quality

response = requests.post(
    "https://yourvoic.com/api/v1/tts/generate",
    headers={"X-API-Key": "your_api_key"},
    json={
        "text": "Fast with better quality.",
        "voice": "Peter",
        "model": "rapid-max"
    }
)

Choosing the Right Model

Use Case	Recommended Model	Why
Voice Assistant	`aura-lite`	Fast response, supports expressions
Audiobooks	`aura-max`	Premium quality, natural prosody
E-learning	`aura-prime`	Clear speech, good quality
IVR/Phone Systems	`rapid-flash`	Lowest latency
Notifications	`rapid-flash`	Fast, cost-effective
Video Narration	`aura-max`	Professional quality
Chatbots	`aura-lite`	Real-time with expressions
Batch Processing	`rapid-max`	Good balance for volume

Previous ← Real-time Streaming Next Voice Library →