Start hereWorkflow
From floor plan to proposal in one project
The design flow in the tool, step by step: import and scale a plan, place devices, check the numbers, build zones, rack and wiring, then issue the paperwork.
Blog, 10
Notes on designing AV systems, from the team that makes the tool.
Plain explanations of the numbers behind audio, Wi-Fi and CCTV designs: what they mean, what moves them, and how Lyra checks them. Written for integrators, installers and estimators.
Where to start
All articles
In reading order, from the whole workflow to each discipline.
Coverage
How to read an SPL heatmap
What decibels of sound pressure mean, how a heatmap’s colour scale works, what uniformity of ±3 dB tells you, and why coverage is drawn to the −6 dB edge.
4 min read
Coverage
How to space ceiling speakers
Spacing ceiling speakers from ceiling height, listening height and coverage angle: the circle at ear level, edge-to-edge or overlapping grids, and the count.
4 min read
Speech intelligibility
What an STI of 0.60 means
What the Speech Transmission Index measures, why 0.60 is a sensible design target under IEC 60268-16, and how reverberation, noise and layout move it.
4 min read
Acoustics
RT60 in plain words
What reverberation time is, how Sabine and Eyring estimate it from a room’s surfaces, and why a lively room changes the speaker count and the STI you can reach.
5 min read
Acoustics
Subwoofers that count where people are
Where to put subwoofers so the bass is even where people sit or stand: room modes, corner and wall positions, the level against the mains, and the checks.
4 min read
Amplifiers and wiring
Low impedance or a 70/100 V line?
When to wire speakers at low impedance and when to use a 70 V or 100 V line, with parallel loads, minimum impedance, taps, cable runs, and power and heat.
4 min read
Acoustics
Designing sound for terraces and gardens
Outdoor areas have no ceiling and few walls. How open sides and open sky change a design, how ambient noise sets the level, and what outdoor speakers need.
3 min read
Wi-Fi
Planning Wi-Fi through walls
How 2.4, 5 and 6 GHz Wi-Fi lose signal through walls of each material, the RSSI worth designing for, and where access points go so the right rooms get it.
4 min read
CCTV
DORI explained for CCTV design
Detect, observe, recognise and identify per EN 62676-4: the pixel density behind each grade, and how resolution, lens and mounting height set the distance.
4 min read
Ready when the client is.
Draw it, check it, show it, price it and hand it over, from one project.
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