A NTP Server with LTC Input and Offsetting Options
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🕰️ NTP Timeturner

NTP Timeturner is a Raspberry Pi-based stratum 1 time server that sets its system clock based on incoming SMPTE LTC (Linear Timecode) audio. Designed for broadcast and production environments, it allows LTC-based time sync across local networks via NTP.


📦 Features

  • 🕒 Decodes LTC timecode from audio input (25fps supported)
  • 🌐 Serves NTP time to local devices
  • Fast, reliable startup using a USB audio interface
  • 🔌 Optional OLED display for system time and sync status (coming soon)
  • 🛜 Web interface for Wi-Fi config and status (in development)

🚀 Quick Start

Requirements

  • Raspberry Pi 3 or newer
  • Debian Bookworm
  • USB audio interface with 3.5mm mic/line input
  • SMPTE LTC source (e.g. video playout, Blackmagic device)

⚙️ Setup Instructions

  1. Clone the repo:
    git clone https://github.com/cjfranko/NTP-Timeturner.git
    cd NTP-Timeturner