🎯 Supernal TTS Quick Reference

Click to copy this entire guide to your clipboard, then paste it into your LLM conversation to give it complete instructions for integrating Supernal TTS.

🚀 Quickstart Commands

# Test without API keys
curl -X POST https://tts.supernal.ai/api/v1/generate \
  -H "Content-Type: application/json" \
  -d '{"text": "Hello!", "options": {"provider": "mock"}}'

# Compare all providers
./demo-scripts/compare-all-providers.sh "Test text"

# Open interactive demo
open demo-scripts/demo.html

📊 Provider Cheat Sheet

Provider	Latency	Cost/1M	Best For	Key Feature
mock	500ms	$0	Testing	No API key
openai	200ms	$15-30	Quality	8 voices + instructions
cartesia	Low latency	~$24	Real-time	Emotions
azure	300ms	$0-16	Budget	500K free

🎤 Voice Options

// OpenAI
['alloy', 'echo', 'fable', 'onyx', 'nova', 'shimmer', 'coral']

// Cartesia
['barbershop-man', 'broadway-diva', 'confident-british-man', 
 'doctor-mischief', 'friendly-sidekick']

// Azure
['en-US-JennyNeural', 'en-US-GuyNeural', 'en-US-AriaNeural']

// Mock
['mock-voice-1', 'mock-voice-2', 'mock-voice-3']

🔧 Environment Variables

# Required for providers
OPENAI_API_KEY=sk-...
CARTESIA_API_KEY=...
AZURE_API_KEY=...
AZURE_REGION=eastus

# Optional
ENABLE_MOCK_PROVIDER=true
DEFAULT_PROVIDER=openai
CACHE_DIR=.tts-cache
PORT=3030

📡 Key Endpoints

# Generate audio
POST /api/v1/generate
{
  "text": "Your text",
  "options": {
    "provider": "openai",
    "voice": "coral",
    "speed": 1.0,
    "instructions": "Speak in a cheerful and positive tone."
  }
}

# Get audio file
GET /api/v1/audio/{hash}

# Get metadata
GET /api/v1/audio/{hash}/metadata

# List providers
GET /api/v1/providers

# Provider stats
GET /api/v1/stats/providers

# Cache stats
GET /api/v1/cache/stats

# Estimate cost
POST /api/v1/estimate

💻 Client Usage

import { TTSClient } from '@supernal-tts/client';

const client = new TTSClient({
  apiUrl: 'https://tts.supernal.ai'
});

// Basic generation
const { audioUrl } = await client.generate({
  text: "Hello world!"
});

// With options
const response = await client.generate({
  text: "Hello world!",
  options: {
    provider: 'cartesia',
    voice: 'confident-british-man',
    speed: 1.2
  }
});

// Get metadata
const metadata = await client.getMetadata(response.hash);

🎯 Provider Selection Logic

function selectProvider(requirements) {
  if (!hasApiKeys) return 'mock';
  if (needsLatency < 100) return 'cartesia';
  if (monthlyChars < 500000) return 'azure';
  if (priority === 'quality') return 'openai';
  return 'openai'; // default
}

💰 Cost Examples

30K character blog post:

• Mock: $0
• OpenAI: $0.45-0.90
• Cartesia: $0.72
• Azure: $0 (if under 500K/month)

100 posts (3M chars):

• Mock: $0
• OpenAI: $45-90
• Cartesia: $72
• Azure: $40 (after free tier)

🐛 Common Issues

# Provider not configured
# → Add API key to .env

# Audio not playing
# → Check CORS settings

# High latency
# → Use Cartesia provider

# Over budget
# → Use Azure free tier or caching

📚 Documentation Links

• API Reference - Complete API documentation
• Security Guide - Production deployment
• Widget Guide - Web integration
• Examples - Integration examples

🚀 Deploy to Production

# docker-compose.yml
services:
  tts-api:
    build: ./families/supernal-tts/apps/api
    environment:
      - NODE_ENV=production
      - OPENAI_API_KEY=${OPENAI_API_KEY}
      - DEFAULT_PROVIDER=openai
    ports:
      - "3030:3030"

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Pro Tip: Start with mock provider, test your integration, then add real API keys!