Features & Capabilities

RTA Audio

Realtime analyzer with recording and Visualizer module with export.

••• Realtime analyzer •••

Realtime analyzer gives you the ability to analyze realtime audio input (built-in microphone or external audio accessory inputs) using Fast Fourier Transform with selected window function. You can also record the input for future offline processing or export.

••• Visualizer •••

This module presents you the results of offline audio analysis. Selecting previously captured recording gives the graph view, spectrogram and waveform of the audio data. Simple controls gives you the ability to play, loop, seek and change rate of the recording synchronized with analysis data presentation. Export function allows you to share or archive your analysis. Resulting PDF document contains basic recording information, spectrogram, peak & RMS graph and frequency table data with maximum peaks (with the time of the occurrence in recording)

••• Features •••

Resolution: 1/2 - 1/96 Octave Logarithmic frequency scale Fixed frequency range (20 - 20kHz) Tone scale view C₀- H₈ (A₄ = 440Hz) Peak hold graph Peak average graph RMS average graph Pointer (watch) function Peak and RMS input meter

••• Audio input specification •••

Audio session mode - measurement Input gain control Sample rate: 48000 Hz Bit depth: Float32 Channel: 1(mono) Frequency range: 20Hz - 20kHz Dynamic range: -100dB - 0dB

••• FFT (Fast Fourier Transform) specification •••

Frame size: 8192 Overlap: from 60% to 90% Smoothing Window: Bartlett-Hann, Blackman, Blackman-Harris (default), Blackman-Nuttell, Cosine, Flat Top, Gauss, Hamming, Hann, Lanczos, Nuttall, Rectangular, Triangular Hardware acceleration

User Growth & Download Statistics

App
By:
New Ball s.r.o.
Rating:
3.60
(31)
Version:
3.2 Last updated: 2024-11-12
Version code:
870365766
Creation date:
2012-05-11
Compatible devices:
Size:
2.09MB
URLs:
Website ,Privacy policy
Full description:
See detailed description
Source:
Apple Apps Store
Data ingested on:
2026-06-04
Compare stats and ranking:

Ranking

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.
Developed by:
New Ball s.r.o.
Apple Apps Store
https://apps.apple.com/us/app/rta-audio/id525324684
Website:
http://www.newball.cz

User Reviews

Users praise RTA Audio for its real-time spectrum visualization and usefulness in calibrating audio systems, noting it shows sounds across the spectrum including low frequencies. Many rely on it for professional live sound work and appreciate its portability on iPhone/iPad. However, recurring issues include microphone access being denied after iOS updates, and a paywall that limits adjusting settings unless upgrading. Occasional bugs and freezes are mentioned, but overall it remains a go-to tool for audio pros who need quick, on-device analysis.
Pros
  • Accurate real-time audio analysis (RTA) with frequency visualization, including low frequencies.
  • Excellent for calibration and measurement tasks (e.g., pink-noise calibration, dB level checks).
  • Reliable, professional-grade tool that works well in live sound contexts and is portable on iPhone/iPad.
Cons
  • Microphone permission issues: mic access is frequently denied or blocked after iOS updates, preventing operation.
  • Paywall limits access to adjusting settings and to unlock full features.
Recent reviews
How might I unlock the full version of your app? I enjoy the features I have access to, and hope to experiment with the settings more.
by Ch*****, 2025-01-26

I use this app all the time to calibrate my stereo system using pink noise. Highly recommended for anyone who is involved with audio and sound.
by Ap*****, 2024-12-17

Not free, paywall to adjust any setting.
by Co*****, 2023-07-17
View all user reviews ›

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