Field tools for venue AV work.
Audio/Video Sync
Measure the real-world timing offset between an audio path and a video path (e.g. Foxtel via a DSP vs an LED screen), using a phone's camera + mic.
Delay Calculator
Work out the delay (ms) to add to a speaker so it time-aligns with another, based on distance to the listening position.
SPL Meter
Monitor sound level with a phone mic and log sessions against a venue's noise limit. Approximate, calibrate against a real meter first.
Speaker Impedance
Work out the total load on an amp channel from series/parallel speaker wiring, and check it against the amp's rated minimum.