Sonic Tools SVM 4+

Rikki Systems Inc.

    • 4.7 • 3.6K Ratings
    • Free



This is an analyzer for sound, vibration and magnetic field. Overall we have the following measuring functions.

* Sound (Analyzer [FFT / RTA / Spectrogram], Scope, RMS, Signal Generator)
* Vibration (Analyzer [FFT], Scope, RMS)
* Magnetic field (Scope, RMS)

You can pinch (zoom) and pan (scroll) on measurement screens other than RTA and spectrogram, and pan (band selection) on RTA. You can pause by tapping the measurement screen. Since the measurement time is displayed at the time of pause, it is suitable for leaving as evidence. Please take a screenshot of the screen in the system standard way.

[Application example]
· Record the present situation as quantitative evidence, such as by using recording and use it for the improvement of obstacles.
· Use it for science education.
· Use it along with the sweep generator to improve the acoustic characteristics of the listening room.
Octave RTA (real-time analyzer) has two configurable items, Please use "Settings .app" and change the following as necessary.
· Window function
· Latency

This application has an audio signal oscillation function, and depending on the operation it may generate sound that is harmful to the human body, so please refrain from using things like headphones or headsets. We are not responsible for damage caused by using that equipment.

The resolution of the spectrum analysis of speech is about 11 Hz inherent, however, the actual resolution is in the maximum of 3 Hz by interpolation processing. It is not the accuracy that can be used to tune an instrument. Please use the instrument tuning application for that purpose.

If you can not find the current point by zooming in or scrolling, you can return to the default state that you can see the whole picture by pressing and holding the measurement screen long.

If a remarkable peak near 1 Hz lasts for more than 10 seconds from the beginning of the spectrum analysis results. It will ignore the peak below 1 Hz after 10 seconds. In most cases, this might happen when the accelerometer is dull.

For a good result with Octave RTA, we recommend using Window Function and Fast Latency Mode.

The adjustable range of the FFT/Scope/RMS gain is from -20 dB to 20 dB.
The adjustable range of the SP gain is from 0 dB to 80 dB.
The noise reduction threshold is from -80 dB to 0 dB.

Allows you to output the data of Sound Spectrum, Sound Spectrogram, and every RMS'.
You can use the data files by on iOS or iTunes File Sharing on Mac.
Please note that the output file of Spectrogram is not small not like other data files.

What’s New

Version 2.1.4

Changed the value of the vibration scope from absolute value to positive/negative value.
However, instead of displaying the raw iOS data as it is, it is converted to a format that does not feel strange.
Because of starting to publish this app on GitHub, I'd like to stop maintaining this in the near future.

Ratings and Reviews

4.7 out of 5
3.6K Ratings

3.6K Ratings

fossilman ,


I worked at a company many years ago in graduate school that engineered and manufactured professional-grade calibration microphones, spectrum analyzers, sound level meters, and dosimeters. Each device cost premium $. And today I just pressed a “Get” button on my iPhone, itself a miracle, and suddenly I have, for free, a spectrum analyzer and sound level meter with options for display, weighting, speed, peak and RMS, etc. And I haven’t even tried the magnetic field sensor option yet.
I have not yet verified and compared this system with calibrated equipment, but for quick acoustic analysis and troubleshooting purposes, this is a godsend.
Miraculous. Thank you developers for your hard work and talent in bringing this technology to the masses.

Developer Response ,

Thank you so much!!

Music c.1960 ,

Great Tool

As a working musician and recording engineer, I depend on reliable equipment for my overall results. This app allows me to have a very portable, accurate measuring device that fits on a music stand.
Of course there are always going to be some limitations with any device. A cellphone, iPad, or laptop doesn’t have a built in calibration reference microphone. However, just to get an idea of loudness contours, at all audible frequencies, is a huge plus.
When setting sound pressure levels and equalizer bands on a PA system, this app and your ears is really all you need to get a very accurate mix.

Developer Response ,

Thank you so much!
I'm a 60 year old software engineer. I was very impressed with the compliment from you this time.
I have been making radios, amplifiers and computers since I was a child, so I have some knowledge of radio waves, electronic circuits and sound.
The reputation of this app is relatively good, and many people praise it, but I'm particularly happy to hear the words from the professionals who use it at work with delight. 😊

-XX:PermSize=32G ,

Thank you Rikki, very cool

The recent change to zooming is awesome, and I love you for it.
One thing that I would like changed is the scale for VIB Scope. Right now, negative values wrap around and become positive again, making it hard to read the graph in certain circumstances. If the 0 could be put in the middle and have equal amounts of negative values as positive values, that tool would be more useful for me. Also, I was fine with the ads. If you want to add an opt-in ad toggle in the settings, I wouldn't mind leaving it on.

Developer Response ,

Thank you so much!
I'd like to improve that you pointed out on VIB Scope.
Please wait for a while.

App Privacy

The developer, Rikki Systems Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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