Sound Spectrum Analysis

Sound Spectrum Analysis

Audio Frequency Analyzer (RTA)

41 ratings
33 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • September 5, 2018
  • February 16, 2026
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About

Analyze sound spectrums in real-time using your device's microphone. This tool offers detailed frequency and amplitude scales, various window functions, and octave band analysis. It can also function as a noise level meter and allows for data export and saving of measurements.

Real-time sound spectrum analysis
Fast Fourier Transform (FFT) with adjustable size
Linear and logarithmic frequency/amplitude scales
Octave band analysis (1/1, 1/3, 1/6, 1/12)
Multiple window functions
A- and C-Weightings
Sound level meter (dB SPL)
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What's New in Sound Spectrum Analysis

2.3.8

February 16, 2026

• Bug fixes.

1

In-App Purchases

$2.99

Full version

Settings, data export.

User reviews

Best in class.

This app has been my go to for spectrum analysis, accuracy is unmatched and the extra features are best bang for buck out there. I’ve tried the other offerings and they’re so gimmicky and focused more on looking good for waaaay too much money.

Not useful for me

The first problem I see is the frequency range is limited to 500hz on the low end. While trying to find a setting that would expand this, it reduced the range again even narrower. If there is a way to set the high and low frequency range, I cannot find it. Moving on…

Response from developer

You can shift the range of frequencies displayed by swiping right or left. You can make the range of displayed frequencies wider or narrower using two fingers.

Unfortunately very buggy

Good when works. After couple recordings app just stops working, restarting doesn’t work at all. Only solution is to reinstall app

Response from developer

Thank you for reporting the issue. Please email me so I can reproduce the issue. If it works at first and then stops working, maybe you changed some app settings?

Needs developer attention

All sections are paid except for a few non-functional ones! I wish they would play ads, but all sections were open! It's really annoying right now.

Response from developer

Not all functions are paid. And the blocked functions are available in the full version of the app for $3. It's almost free. Those who show ads collect information about users in order to better manipulate and force them to pay much more than $3.

HAHAHAHA

made someone kick out someone else

Developer apps

FAQ

What does the Sound Spectrum Analysis app do?

This application analyzes the sound spectrum in real-time using your device's microphone. It can display sound waves, perform Fast Fourier Transforms (FFT) with various sizes for accuracy, and measure noise levels. It also offers detailed frequency and amplitude scales, octave band analysis, and various window functions.

What are the key features of this app?

Key features include real-time sound wave and spectrum analysis, adjustable FFT sizes for frequency accuracy, linear and logarithmic scales for frequency and amplitude, octave band analysis, multiple window functions, A- and C-weightings, peak hold, exponential spectrum averaging, and a sound level meter (dB SPL).

How can I calibrate the sound level meter?

You can calibrate the sound level meter by using a signal generator on another device to produce a low-volume 1000 Hz sinusoid. Find the amplitude for 1000 Hz on the spectrum (with FFT size 16384) and multiply it by 1.2 to compensate for spectral leakage. This value serves as the reference for your microphone.

Can I save or export my measurements?

Yes, you can save measurement results within the application and export data to WAV or text files. Saved data files can be transferred to a computer via iTunes. The app also allows for quick loading and comparison of saved files.

Is this app free to use?

The application is free to download and use, but it offers in-app purchases. These purchases likely unlock additional features or enhance the existing functionality beyond the basic free offering.