# RTA Audio

> Music

Canonical page: [https://chrome-stats.com/d/id525324684](https://chrome-stats.com/d/id525324684)

## Overview

- **ID:** `id525324684`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** New Ball s.r.o.
- **Category:** Music
- **Rating:** 3.60 / 5 (31 ratings)
- **Version:** 3.2
- **Last updated:** 2024-11-12
- **First published:** 2012-05-11
- **Size:** 2.09 MB
- **Data as of:** 2026-09-06
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/rta-audio/id525324684)
- **Website:** [http://www.newball.cz](http://www.newball.cz/)
- **Privacy policy:** [https://www.newball.cz/en/policies/rta-audio-privacy-policy-en/](https://www.newball.cz/en/policies/rta-audio-privacy-policy-en/)

## Description

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

## Rankings

- #230,163 — Overall

## Review summary

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.

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Source: [Chrome-Stats](https://chrome-stats.com/d/id525324684)