A gesture-controlled DJ/beat-making AR Snapchat Lens built at YHack 2026. Use hand gestures to trigger drum sounds and visual effects in real time.

Point your camera at your hands — no tapping required.

Tap the screen to show help text.

• Real-time hand tracking — detects gestures on both hands independently
• 4 drum loop tracks — arpeggio, break, drum & bass, drums; synchronized switching keeps the beat position intact
• Particle effects — canvas-drawn rings, trails, and ticks; capped at 120 particles for performance
• One-shot samples — bass, clap, crash, cymbal
• Front & back camera support, mobile & web compatible

Assets/
├── Scripts/LensController.js       # Main controller — gesture → audio + visuals
├── TrackManager.js                 # Synchronized multi-track loop player
├── Audio/                          # beat, scratch, snare, hihat
├── tracks/                         # arpeggio, break, dnb, drums (WAV loops)
├── one-shots/                      # bass, clap, crash, cymbal
├── Easy Lens/                      # Experimental controller variations (v1–v7)
├── Gesture Triggers*.lspkg/        # Hand gesture detection packages
├── Audio Output - Oscillator.lspkg/
└── Grab Object With Hand.lspkg/

• Lens Studio 5.19.2
• JavaScript (ES2019)
• Canvas API — 2D particle rendering
• Lens Studio Hand Tracking & Audio Component APIs

1. Open dj.esproj in Lens Studio 5.19.2+
2. Connect the lens to your Snapchat account via the pairing flow
3. Point the camera at your hands and try each gesture

github.com/plasmavolt/yhack26