Over 26 calculators for pro-audio sound reinforcement and lighting as well as reference info and utilities. A super handy tool for people dealing with PA sound reinforcement sound systems electroacoustics pro-audio and lighting

The app is very light (~1MB like a typical mobile phone photo) works offline and uses no data bandwidth

More than 42 calculations spread across 26 calculators:
- SPL (sound pressure level). Enter sensitivity in dB SPL power number of loudspeakers phase and distance
- SPL sum
- Air absorption attenuation for a given humidity temperature frequency and distance
- Ceiling speaker coverage
- Time «» Distance
- Audio frequency «» Wavelength (includes lambda/2 and 2*lambda/3 for line arrays or subwoofer arrays)
- Line Array transition distance (near field to far field)
- dBu «» dBV «» Volts
- Q «» B/W (bandwidth)
- Limiter threshold (and times)
- Amplifier gain
- Speaker cable: low impedance high impedance (constant voltage line 70V/100V). Calculates energy and level loss system damping factor
- Electrical and musical calculators that are related to audio. Unit conversion
- Lights: DMX channel RGB/RGBW/RGBA and CMY
- Reference info:
Pinouts proaudio (XLR 1/4" SpeakOn DB25) and lighting (XLR3 XLR5) and graphs (Fletcher&Munson microphone polar plots)
- Utilities (inclinometer flashlight-needs camera permission that can be later revoked in phone settings)

iOS (iPhone/iPad) and WindowsPhone versions are also available