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The Audio Toolbox

iPhone / iPad
  • Utilities
  • Productivity
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The Audio Toolbox performs six handy functions for Live Sound Engineers, particularly those of us working in Live Theatre.

The MIDI Tester works in conjunction with any Made For iPhone compatible MIDI Interface, as well as Network and Bluetooth MIDI. It displays all the MIDI received into the phone, which is really useful when fault finding any connectivity issues. As well as reading all standard MIDI messages, the MIDI Tester also reads all MIDI Show Control commands!

The Aerial Length Calculator helps you work out the optimum length of your transmitter aerial, based on the frequency you are transmitting on. There are currently two formulas available in the app, one which is based on a Quarter Wavelength and one which has been optimised for Sennheiser Transmitters such as the SK5212, SK5012 and the 9000 Series.

An included Delay Time Calculator is really useful for quickly working out the delay times for all your loudspeakers. Just input a distance in either meters or feet and it will give you a time in milliseconds. You can even adjust the results based on the ambient temperature.

A Time Calculator allows you to add, subtract, multiply or divide two different times together. Unlike any other app we can find on the App Store, it is accurate down to the millisecond. That's really handy when working with precisely timed video or lighting cues.

Ever got into work to discover some of your speakers have been accidentally knocked? You can now record the angles of as many speakers as you like in one handy list. Want to check if any of them have moved? just click on an angle, hold the phone up to the speaker and the app will compare the results. The screen will go green and the phone will beep when you are all matched up.

Finally, for fine tuning your delay times, The Audio Toolbox includes a built in click sound! The click will loop for as long as you like, and interacts with the audio controls on the rest of the phone, so you can pause it from the lock screen.