JadeSpectrogram by Jade Hochschule 0 (0)

is a VST3/AU plug-in for real-time spectrum analysis. It gives you access to many of the analysis parameter, like the used window or the FFT-size. The display of the analysed data can be changed afterwards. It is possible to change the displayed frequency range and the colourmap (and its dynamics).

The source code is here:

GitHub Repository

Enjoy.

jadespectrogram_win

jadespectrogram_mac

jadespectrogram_linux