Jarvis Vocal

Authentic J.A.R.V.I.S. voice synthesis using Piper TTS with HuggingFace-trained model. Generates movie-accurate voice locally and can push to connected Android devices via OpenClaw nodes.

Uses the authentic J.A.R.V.I.S. voice model from HuggingFace (trained on actual movie lines) via Piper TTS. No audio effects needed — the voice is naturally cinematic and British.

Credit: Voice model by jgkawell — see the discussion for details on training and samples.

Usage

Generate a WAV file:

{baseDir}/bin/jarvis-tts "Text to speak" ./output.wav

Stream directly to an Android device (if ADB connected):

{baseDir}/bin/jarvis-tts "Text to speak" - | adb push - /sdcard/Download/temp.wav

Installation

Prerequisites

pipx install piper-tts
sudo apt install ffmpeg  # or equivalent

Install Voice Model

# Create voice directory
mkdir -p ~/.local/share/piper/voices/en_GB

# Download models via HuggingFace CLI
cd ~/.local/share/piper/voices/en_GB
hf download jgkawell/jarvis en/en_GB/jarvis/high/jarvis-high.onnx --local-dir .
hf download jgkawell/jarvis en/en_GB/jarvis/high/jarvis-high.onnx.json --local-dir .
# Optional: medium quality model
hf download jgkawell/jarvis en/en_GB/jarvis/medium/jarvis-medium.onnx --local-dir .
hf download jgkawell/jarvis en/en_GB/jarvis/medium/jarvis-medium.onnx.json --local-dir .

Integration

Works with OpenClaw Android nodes via ADB over Tailscale. Use jarvis-speak wrapper for one-command push+play:

jarvis-speak "Systems at your service, Sir."

Or use streaming mode (faster, ephemeral):

jarvis-speak "Message" --stream

Configuration

Setting	Default	Description
Model	jarvis-high	Voice quality: high (114MB) or medium (63MB)
Speed	1.0 (native)	Piper length-scale — adjust for faster/slower speech
Volume	1.0	Post-processing volume boost

Edit jarvis-speak script to change defaults.

Troubleshooting

"Model not found" → Download models to ~/.local/share/piper/voices/en_GB/jarvis-*

ADB connection refused → Ensure phone's ADB over WiFi is enabled and paired with laptop (port 5555)

Audio doesn't play → Check Android receives the file at /sdcard/Download/jarvis-current.wav and has a WAV-capable media player

License

MIT — The voice model is MIT licensed by jgkawell.

Credits

• Voice model: jgkawell/jarvis on HuggingFace — trained on Marvel movie lines
• TTS engine: Piper by Rhasspy
• Integration: OpenClaw by Aidan Park