RTA Pro - Realtime Audio Analyzer


RTA Pro is a real time audio spectrum analyzer. It turns your iOS device into a powerful audio test system seen only in audio research, laboratories and music studios. Such instruments are used to analyze the frequency spectrum of environmental noise, e.g. to be able to pinpoint frequencies which cause rumble in a room. Another use is the level setting setting of PA systems for concerts.

RTA Pro requires iOS7 and has been calibrated for the microphones of iPhone 4S, iPhone 5 and the iPod Touch 5th gen. Custom calibration is also possible. The frequency range is 32Hz to 16kHz. Correction for measuring dB(A) and dB(C) is provided. Apart from 1/3 Octave Bands and Octave Bands, RTA Pro also features the display of a Fast Fourier Transform (FFT). The speed is adjustable to impulse, 128ms and 1 second. The feature list is rounded up by a noise generator with white and pink noise. It is possible to share measurement results via eMail.

RTA Pro is compatible with the Mic W i436 measurement microphone!

Even though the RTA Pro Software has been calibrated using professional grade equipment (B&K 2215), do no use RTA Pro to carry out professional measurements. The author can’t be held liable for any damage which might arise by using RTA Pro.