This is a simple Audio Analyzer Plugin created using JUCE.
It fully supports the functionality as an Audio Units (AUv3) plugin extension.

You can check the waveform and spectrum of the input voice using this app.
You can change the length, upper limit, and lower limit of the displayed waveform.
In addition, the scale for displaying the spectrum can be selected from the linear scale and logarithmic scale.

If it is launched standalone, it will use the mic input.
When there are two or more channels input, only the analysis result of the first channel is displayed.