The latest version (2.3.2) released on this web site (not in the MS store yet) has a new “Low Frequencies Center” option added to the FFT filter control. This option is more convenient for common FFT filters.
![](http://sound-analysis.com/wp-content/uploads/2022/01/image-1024x809.png)
By including the low frequencies in the center of the FFT mask window a low pass filter can be implemented.
![](http://sound-analysis.com/wp-content/uploads/2022/01/image-1-1024x803.png)
By excluding the same low frequencies a high pass filter can be implemented.
Keeping the resolution low (256×256 in this case) will provide a reasonable live experience; still not quite real-time.
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