AV Toolbox
Calculators and Tone Generator
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Archived App (Last seen on 21 Jan 2026)
This is an archived listing of the app previously available on the App Store.Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.
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About
AV Toolbox contains a range of tools handy for the AV professional and amateur alike.
Audio calculators are included for:
Sound Pressure Level (SPL) at applied power levels and distance from speaker
Calculation of impedance based on 70V and 100V line applied power and vice-versa.
Ohms Law - Voltage, current & Resistance.
Delay based on distance from speaker.
Video calculators are included for:
Projector throw distances based on screen width and projector min and max throw ratios.
Screen sizes based on throw distance and projector min and max throw ratios.
Calculation of throw ratios based on throw distance and screen width.
Tone generators - Pink, White, Sine and Voice.
Audio data sheets for:
Common UK radio mic frequencies.
Typical SPL chart.
Common audio signal levels.
Links to ICSE & PLASA organisations.
Video data sheets for:
VGA Pin configuration.
SCART Pin Configuration.
Common screen resolutions.
This app does not claim to be the definitive guide to all things audio-visual but but contains information used on a day-by-day basis by AV engineers to carry out their work efficiently and quickly.
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What's New in AV Toolbox
1.2
March 28, 2018
Minor bug fixes relating to tone generators
