Automatl DSP has launched EasySSP, an open source spectrometer and goniometer effect plug-in.
Easy Sound Space Perception is a small and lightweight audio visualization tool, which currently provides spectrometer and goniometer views.
The main advantage of this tool is that it can render information about up to four stereo pairs at the same time onto the same surface using different colors (see screenshots). And more cool features are on the way, that’s for sure.
EasySSP is available to download as binaries (VST) for Windows.
More information: Automatl DSP