miruns share

Lightweight EEG session viewer for shared Miruns sessions. Paste a share link to visualize waveforms, frequency spectrum, and band power — all client-side.

Features

• Waveform — multi-channel EEG with pan, zoom, and per-channel toggles
• Spectrum — averaged PSD (Welch method) with EEG band overlays
• Band Power — relative delta/theta/alpha/beta/gamma breakdown
• Health & Environment — heart rate, HRV, and contextual data when available
• Zero dependencies — vanilla TypeScript, canvas rendering, no chart libraries

Stack

• TypeScript + Vite
• Custom Cooley-Tukey FFT (matches the Flutter app's FftEngine)
• Hosted on Vercel, API served by miruns-link

Development

npm install
npm run dev

How it works

1. User shares a session from the Miruns app → generates a short code via miruns-link
2. miruns-share fetches the session JSON by code
3. Signal data is parsed and rendered to <canvas> elements client-side
4. FFT and PSD are computed in the browser — no server-side processing