Hardware systems
Field-engineered hardware for wireless event audio.
Hardware at Event Tech Research is developed around live deployment pressure: moving platforms,
hostile RF conditions, fast setup windows, and the need for audio systems to keep behaving as one.
Featured hardware
Hedera Link
Hedera Link is a field-engineered wireless audio bridge for processional events and moving sound
systems. It is designed to carry analogue programme audio into an embedded endpoint, convert it to
digital audio, transport it over an unlicensed 5 GHz IP link, and return it to analogue audio at the
receiving platform with minimal operational friction.
The hardware approach combines ADC/DAC endpoint cards, single-board compute, controlled packet
transport, and symmetrical horn antenna coverage so multiple moving systems can play as one across
difficult routes such as Notting Hill Carnival.
Audio endpoints
Input and output cards
Analogue audio is isolated, converted at the endpoint, and passed into the digital transport path
before being reconstructed at the receiving system.
- ADC and DAC signal-chain design
- Embedded Linux audio appliance concepts
- Field-serviceable input and output roles
RF path
5 GHz bridging
Hedera Link uses licence-free IP transport over directional wireless links, with antenna choices
shaped by motion, vibration, elevation change, and crowd-heavy RF noise.
- TDMA-style wireless bridge thinking
- Point-to-point and point-to-multipoint layouts
- Route-aware coverage planning
Antenna system
Symmetrical horn coverage
Symmetrical horn antennas provide a cleaner, more predictable coverage shape than narrow-elevation
sector patterns when trucks move, tilt, vibrate, and change spacing.
- Wide azimuth and elevation coverage
- Low side-lobe, predictable beam behaviour
- Better tolerance of changing geometry
Built for harsh live conditions
The design priority is route-wide continuity and recoverable operation rather than lab-only
performance. Every hardware choice is judged by how it behaves when the route is moving and the
crew has limited time to intervene.
- Moving floats, changing line of sight, and vibration
- Dense consumer Wi-Fi and production RF environments
- Simple deployment steps for crews under pressure
Research and documentation
Hedera Link is supported by field notes, white paper material, antenna research, and the Cirrus
Appliance software stack so the hardware can be understood, reproduced, and improved over time.
