04 / LAB / EXP 003
PA Delay Designer
A browser-based 3D tool for calculating loudspeaker alignment delays in live-sound rigs. Place speakers relative to a reference point — typically the main hang — in a Three.js viewport with orbit controls, axis-locked move gizmos, grid snap, and 3D/top/front/side views; the app computes each speaker's distance and sound-propagation time at the current air temperature, the value you dial into the processor feeding it. Speaker types with per-type color and reference SPL, groups that move as one cluster, an optional room box with real dimensions, undo/redo, and projects that save and load as JSON. Works in meters or feet, °C or °F. v0.1 — early prototype, single file, no build step.