Spectralizer will not be developed anymore, if you're looking for an excellent replacement check out Waveform.
Audio visualization for obs-studio using fftw, based on cli-visualizer
Allows for vizualisation of MPD and internal obs audio sources.
Issues have moved to git.vrsal.xyz/alex/spectralizer/issues. You can submit new ones under bugs.vrsal.xyz/alex/spectralizer and comment under bugs.vrsal.xyz/alex/tuna/[issue number] (for example https://bugs.vrsal.xyz/alex/spectralizer/63 for this issue)