RTA Pro: Spectrum Analyzer

Turn your iPhone into a real-time audio analyzer. RTA Pro shows every frequency live, with the peak, the level and the musical note on screen, so you can tune a car audio system, a PA or a home studio with your eyes as well as your ears. WHY RTA PRO • Readings you can trust: levels checked against an independent calculation • Numbers always on screen: peak frequency, level, Max and Leq, readable from a distance • Open it and measure: no account, no sign-up • Works fully offline, in English, French, German, Korean and Portuguese MEASURE • Real-time FFT up to 32,768 points, logarithmic or linear scale • RTA in 1/1, 1/3 and 1/6 octave bands (IEC 61260 center frequencies) • Full-screen spectrogram (waterfall) to follow the sound over time • A, C and Z weighting, averaging and peak hold • Musical note of the peak, with its offset in cents: name a room mode or a feedback tone at a glance…