ShadowPlayKA vs PeerClock Metronome

ShadowPlay is an exploration of the architecture and light in outdoor spaces through sound. Using a bicycle-mounted smartphone as a brightness sensor and a bluetooth speaker, the mottled patterns of light and shadow become the musical score as one rides along city streets. Supported through the UNESCO City of Media Arts Karlsruhe as well as through the City of Karlsruhe. Scene contributions by Sofy Yuditskaya and Damian Stewart.

PeerClock Metronome is a P2P-synchronized metronome for Apple devices. Just connect multiple devices to the same Wi-Fi — no server needed. All devices automatically discover each other and sync their clocks with ±2ms precision using NTP-style 4-timestamp exchange. Features: • Peer-to-peer — no master/slave, every device is equal • ±2ms clock synchronization • Wi-Fi only — no external server, no internet required • Auto-discovery — connect to the same Wi-Fi, that's it • Visual conductor path animation with brush-stroke style • Multiple time signatures: 4/4, 3/4, 4/8, 3/8, 6/8, 9/8, 12/8 • Live BPM changes sync across all connected devices • Built on PeerClock — an open-source P2P clock sync framework Perfect for musicians, bands, and ensembles who need synchronized timing across multiple devices without relying on cloud services.