Audio Spectrum Analyzer 4+
Black Cat Systems
Designed for iPad
-
- $3.99
Screenshots
Description
Spectrum Pad turns your iPad, iPhone, or iPod Touch into an audio spectrum analyzer. Frequencies up to 20 kHz can be displayed.
You can control the displayed frequency span, as well as the FFT size, from 1024 to 262144 bins.
A logarithmic display of the entire 10 Hz to 20 kHz frequency range is available, and the graph fill mode can be turned on and off, as well as the display of up to five frequency markers.
Filtering (averaging) can be applied to the spectrum, to smooth out variations.
You can turn on the Peak Hold to make it easier to see transient events, as well as adjust the decay rate.
Swiping with two fingers lets you adjust the brightness of the spectrum or the graticule grid overlay.
Tapping three times with two fingers will save a screenshot to your Photos.
One of several user selectable window functions can be used:
Rectangular
Hanning
Hamming
Tukey
Cosine
Lanczos
Blackman
What’s New
Version 1.5
This app has been updated by Apple to display the Apple Watch app icon.
Updates for iOS 10.3
Adds Blackman-Harris window
Adds volume indicator
Ratings and Reviews
Very nice spectrum analyzer
Unlike many other spectrum apps, this one allows some configuration. You can select the window type, peak hold average, and number of spectral lines, among other things. You can't select a maximum frequency other than the highest possible (I guess because this would require a down sampler and digital filter), but since it lets you pick a very high number of spectral lines, you can window the results to get what you need and still have reasonable resolution.
We use it for quick and dirty measurements when we don't want to set up the high dollar gear. For example, we recently used it to determine blade natural frequencies (or at least the first one since it radiated significant sound) for an axial compressor to select which should be adjusted to meet the spec. This saved the project many hundreds of dollars in setup time for each blade. We used our high tech gear to get the final data, but this app was great for the initial cuts.
I'd give it five stars, but I'm saving the extra star for when they update to provide a linear vertical axis and perhaps more control over FFT parameters.
Got noise?
Excellent tool for analyzing sound background noise, and data transmission modes. Features allow zooming in and out and peek hold.
Accurate on iPad mini
Happy with this app. Frequency markers on peaks very handy. Checked against 500 and 600 Hz tones on WWV and both were within 0.1 Hz. Recommended.
App Privacy
The developer, Black Cat Systems, has not provided details about its privacy practices and handling of data to Apple.
No Details Provided
The developer will be required to provide privacy details when they submit their next app update.
Information
- Seller
- Black Cat Systems
- Size
- 1.2 MB
- Category
- Utilities
- Compatibility
-
- iPhone
- Requires iOS 6.0 or later.
- iPad
- Requires iPadOS 6.0 or later.
- iPod touch
- Requires iOS 6.0 or later.
- Mac
- Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
- Apple Vision
- Requires visionOS 1.0 or later.
- Languages
-
English
- Age Rating
- 4+
- Copyright
- © 2010-2014 Black Cat Systems
- Price
- $3.99
Supports
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Family Sharing
Up to six family members can use this app with Family Sharing enabled.