Voxengo has released an update to the SPAN free real-time “fast Fourier transform” audio spectrum analyzer plugin.
Version 3.7 adds the “True Peak/Sample Peak” switch which can be used to switch between true peak and sample peak indication.
SPAN provides you with a very flexible “mode” system which you can use to setup your spectrum analyzer preferences. You may specify Fourier block size in samples, FFT window overlap percentage, spectrum’s visual slope. Beside that you can choose to display secondary spectrum of a desired type (e.g. real-time maximum, all-time maximum). Spectrum can be smoothed out visually for an easier examination.
The plugin is available in VST/VST, AU and AAX formats for Windows and macOS.