Jetson CUDA Voice Skill

A high-performance, bilingual (English/Greek) local voice assistant pipeline designed specifically for resource-constrained platforms like the NVIDIA Jetson Xavier NX.

Architecture

┌─────────────────────────────────────────────────┐
│ JETSON CUDA VOICE PIPELINE (COMPLETE STACK)     │
├─────────────────────────────────────────────────┤
│                                                  │
│ 1. ReSpeaker Microphone (hw:Array,0)            │
│    └─ Always listening                          │
│                                                  │
│ 2. Silero VAD (330ms)                           │
│    └─ "Is there speech?"                        │
│                                                  │
│ 3. Hey Jarvis Detection (137ms)                 │
│    └─ "Is wake word detected?"                  │
│                                                  │
│ 4. ReSpeaker LED Feedback                       │
│    └─ 🟣 Purple pulse = Listening               │
│                                                  │
│ 5. Fast-Path LLM Query (0.26s)                  │
│    └─ Groq LLaMA 3.1 8B instant query           │
│                                                  │
│ 6. Slow-Path LLM Query (with tools)             │
│    └─ OpenClaw Gateway Session (HA, Web, Weather)│
│                                                  │
│ 7. Edge TTS (el-GR-NestorasNeural / Edge)        │
│    └─ Generate Greek/English response           │
│                                                  │
│ 8. Speaker Output (hw:C2c,0)                    │
│    └─ Play response                             │
│                                                  │
└─────────────────────────────────────────────────┘

Features

• Double-Path Architecture:
  • Fast-Path: High-performance Groq-based direct query with ultra-low latency (~260ms) for casual queries.
  • Slow-Path: Fully-featured OpenClaw gateway connection with device control, web search, and weather integration.
• Bilingual Processing: Seamless support and automatic language matching for Greek and English.
• Local Wake Word Detection: Employs openWakeWord with a custom pre-trained model (hey_jarvis_v0.1.onnx) optimized for Jetson ARM64 architecture.
• Systemd Integration: Includes service templates for background daemonization and boot-persistent listening.
• Visual LED Feedback: Direct support for the ReSpeaker Mic Array LED indicators (purple pulse on listening).

Installation & Setup

1. System Dependencies: Ensure arecord and Python 3.11 are installed.

2. Required Environment Variables: Configure the following environment variables in your systemd unit or .bashrc:

   • OPENCLAW_GATEWAY_TOKEN: OpenClaw Gateway authorization token.
   • GATEWAY_URL: Base URL of the OpenClaw instance (e.g., http://127.0.0.1:18789).
   • GROQ_API_KEY: API Key for fast-path inference.
   • ALFRED_MIC: Audio recording hardware interface (default: hw:Array,0).
   • ALFRED_SPEAKER: Audio output speaker interface (default: hw:C2c,0).

3. Running the Daemon: To start the pipeline daemon:

   ./scripts/manage.sh start
   

4. Running as a Systemd Service: Copy the service template to your user-level systemd directory (~/.config/systemd/user/voice-pipeline.service) and manage it via:

   systemctl --user daemon-reload
   systemctl --user enable voice-pipeline.service
   systemctl --user start voice-pipeline.service