https://api.smallest.ai/waves/v1. 80+ voices across 4 languages, 44.1 kHz native sample rate, ~200ms latency, with sync, SSE, and WebSocket streaming.
Hear Lightning v3.1 (voice: magnus):
Quickstart
Generate your first audio in under 60 seconds.
Synthesis Modes
Choose the synthesis mode that best fits your application’s needs:Synchronous
Generate complete audio files with a single HTTP request. Ideal for pre-rendering content, batch processing, and applications where immediate streaming isn’t required.
Streaming
Receive audio chunks as they’re generated via WebSocket. Perfect for real-time voice assistants, live narration, and low-latency conversational AI.
Available Models
Lightning v2
Legacy High-quality multilingual TTS with 100ms TTFB. Supports 16+ languages including English, Hindi, and European languages. Includes voice cloning support.
Lightning v3.1
Our most natural-sounding model with 44 kHz audio output. Ultra-low latency with expressive, human-like speech. Supports English, Hindi, Tamil, and Spanish with voice cloning.
Feature Highlights
Ultra-Low Latency
Ultra-Low Latency
Optimized streaming pipeline delivers sub-100ms time-to-first-byte (TTFB) for real-time applications. Lightning v3.1 achieves even faster response times for conversational AI.
Voice Cloning
Voice Cloning
Create custom voice profiles by uploading audio samples. Instant voice cloning works with just a few seconds of audio, while professional voice cloning delivers studio-quality results.
16+ Languages
16+ Languages
Comprehensive language support including English, Hindi, Tamil, Kannada, Malayalam, Telugu, Gujarati, Bengali, Marathi, German, French, Spanish, Italian, Polish, Dutch, and Russian.
Multiple Output Formats
Multiple Output Formats
Choose from PCM, WAV, MP3, or μ-law encoding. Configurable sample rates from 8kHz to 44kHz to match your application’s requirements.
Speed Control
Speed Control
Adjust speech rate with a simple multiplier. Slow down for clarity or speed up for faster content delivery without pitch distortion.
Pronunciation Dictionaries
Pronunciation Dictionaries
Define custom pronunciations for brand names, technical terms, and acronyms. Ensure consistent, accurate pronunciation across all synthesized audio.
High-Quality Audio
High-Quality Audio
Lightning v3.1 produces 44 kHz audio with natural prosody and expressiveness. Perfect for audiobooks, podcasts, and premium voice experiences.
WebSocket Streaming
WebSocket Streaming
Persistent connections for continuous audio streaming. Ideal for voice bots and interactive applications where latency is critical.
Supported Languages
Explore
Quickstart
First API call in 60 seconds
Streaming
Real-time audio via WebSocket
Voice Cloning
Clone from 5-15 seconds of audio
Cookbook
20+ open-source examples on GitHub
Showcase
See what developers have built
Model Card
Lightning v3.1 specs and benchmarks