SPAN is a real-time “fast Fourier transform” audio spectrum analyzer plug-in for professional music and audio production applications.
For the most part it was derived from Voxengo GlissEQ dynamic parametric equalizer and reproduces its spectrum analysis functionality.
Overtone GEQ is 7-band harmonic (overtone) graphic equalizer AU and VST plugin with multi-channel operation support (supporting up to 8 input/output channels, host setup-dependent). Overtone GEQ offers extensive internal channel routing capabilities, and supports mid/side channel processing. Beside equalizing, Overtone GEQ applies harmonic enhancement processing: it uses 7 harmonic enhancement modules, one for each EQ band. This generates a complex harmonic coloration you will probably like a lot.
These updated and other pro audio plug-ins can be downloaded at the Voxengo web site.
More information: Voxengo