Free Professional Audio Tools for Live Sound Engineers

Built by a working FOH engineer. No ads, no tracking, works offline. Calculate delay times, convert levels, plan storage — backstage, on your phone.

Try Delay Calculator →

Used at venues across the UK. No account needed. Ever.

Available Tools

Audio Delay Calculator

Distance ↔ ms ↔ samples converter with temperature-adjusted speed of sound. Subwoofer alignment included.

  • Temperature-compensated calculations
  • Subwoofer delay alignment
  • Speaker distance presets
Open Tool

dB / Level Converter

dBu ↔ dBV ↔ dBFS ↔ volts ↔ watts. Combine multiple sources. Reference table included.

  • All professional reference levels
  • Add dB values (combine sources)
  • Quick reference chart
Open Tool

Recording Storage Calculator

Sample rate + bit depth + channels + duration → file size. Plan your SD cards.

  • All common formats (WAV, BWF, MP3)
  • Multi-track calculations
  • SD card capacity presets
Open Tool

Get the Free Live Sound Cheat Sheet

One-page PDF: gain structure, mic patterns, cable pinouts, delay formulas, dB references. The card I keep on my console.

Why This Toolkit?

Written by a working engineer

I mix FOH at venues across the UK every week. These tools solve problems I actually face at shows.

Works offline

Service worker caches everything. No signal backstage? Tools still work.

Mobile-first

Large touch targets, readable in bright sunlight, no horizontal scroll.

Pro references

Formulas from Bob Katz, Rumsey & McCormick, Talbot-Smith. Not guesswork.