managarten/services/mana-tts/CLAUDE.md

mana-tts

Text-to-Speech microservice. Wraps Kokoro (English presets), Piper (German, local ONNX), and F5-TTS (voice cloning) behind a small FastAPI surface. Lives on the Windows GPU server (mana-server-gpu, RTX 3090).

⚠️ Earlier history: this directory used to contain MLX-optimized Mac-Mini code (f5-tts-mlx, mlx-audio, setup.sh with Apple Silicon checks, com.mana.mana-tts.plist launchd setup). All of that moved to the Windows GPU box and was removed from the repo. If you need the MLX path, see git history.

Tech Stack

Layer	Technology
Runtime	Python 3.11 + uvicorn (Windows)
Framework	FastAPI
English (preset)	Kokoro-82M (kokoro_service.py)
German (local)	Piper ONNX with kerstin_low.onnx and thorsten_medium.onnx voices (piper_service.py)
Voice cloning	F5-TTS on CUDA (f5_service.py)
Audio I/O	soundfile, pydub
Auth	Per-key + internal-key API auth (auth.py) + JWT via mana-auth (external_auth.py)
VRAM	Shared vram_manager.py (same module as mana-stt + mana-image-gen)
Process supervision	Windows Scheduled Task ManaTTS (AtLogOn)

Port: 3022

Where it runs

Host	Path on disk	Entrypoint
Windows GPU server (192.168.178.11)	C:\mana\services\mana-tts\	service.pyw via Scheduled Task ManaTTS

Public URL: https://gpu-tts.mana.how.

API Endpoints

Method	Path	Description
GET	/health	Liveness + which backends are loaded
GET	/models	Available TTS models
GET	/voices	List all voices (preset + custom)
POST	/voices	Register a custom voice (reference audio + transcript)
DELETE	/voices/{voice_id}	Delete a custom voice
POST	/synthesize/kokoro	Kokoro synthesis (English presets)
POST	/synthesize	F5-TTS voice cloning
POST	/synthesize/auto	Routing helper — picks the right backend for the requested voice

All non-health endpoints require Authorization: Bearer <token> (per-app key, internal key, or mana-auth JWT).

Voices

Kokoro-82M (English presets)

~300 MB download. 30+ preset English voices. Fast, no reference audio needed.

Piper (German, local ONNX)

~63 MB per voice. 100% local, GDPR-compliant. Available:

• de_kerstin (female, default)
• de_thorsten (male)

Fallback to Edge TTS cloud voices if Piper isn't loaded.

F5-TTS (voice cloning)

~6 GB. Requires reference audio + transcript. Higher quality, slower. Custom voices live in voices/ (reference audio + transcript per voice ID).

Configuration (.env on the Windows GPU box)

PORT=3022
PRELOAD_MODELS=false
MAX_TEXT_LENGTH=1000
REQUIRE_AUTH=true
API_KEYS=sk-app1:app1,sk-app2:app2
INTERNAL_API_KEY=...
CORS_ORIGINS=https://mana.how,https://chat.mana.how

Code layout

services/mana-tts/
├── app/
│   ├── __init__.py
│   ├── main.py             # FastAPI endpoints
│   ├── kokoro_service.py   # Kokoro (English presets)
│   ├── piper_service.py    # Piper (German, local ONNX)
│   ├── f5_service.py       # F5-TTS (voice cloning, CUDA)
│   ├── voice_manager.py    # Custom voice registry
│   ├── audio_utils.py      # Format conversion, resampling
│   ├── auth.py             # API-key auth
│   ├── external_auth.py    # JWT validation via mana-auth
│   └── vram_manager.py     # Shared VRAM accountant
└── service.pyw             # Windows runner (used by ManaTTS scheduled task)

The Piper voice ONNX files live alongside the service on the GPU box (C:\mana\services\mana-tts\piper_voices\*.onnx) — too big to commit, downloaded once during setup.

Operations

# Status
Get-ScheduledTask -TaskName "ManaTTS" | Format-List TaskName, State
Get-NetTCPConnection -LocalPort 3022 -State Listen

# Restart
Stop-ScheduledTask -TaskName "ManaTTS"
Start-ScheduledTask -TaskName "ManaTTS"

# Logs
Get-Content C:\mana\services\mana-tts\service.log -Tail 50

Reference

• docs/WINDOWS_GPU_SERVER_SETUP.md — Windows box setup, scheduled tasks, firewall, Cloudflare tunnel
• docs/PORT_SCHEMA.md — port assignments across services