Overtone GEQ is a 7 band harmonic (overtone) graphic equalizer 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. Overtone GEQ was designed to allow audio engineers to apply quick EQ shape adjustments together with adding a bit of harmonic richness to the audio material (mainly mixes and sub-mixes due to a comparably high processing load this EQ puts on a CPU).

• 7-band graphic equalizing.
• Stereo and multi-channel processing.
• Mid/side processing.
• 64-bit floating point processing.
• A/B comparisons.
• Zero processing latency.
• +/- 12 dB gain range per band.
• Internal channel routing.
• Complex harmonic coloration.
• Preset manager.
• Contextual hint messages.
• 2 graphic equalizer views.
• Channel grouping.
• Up to 8x oversampling.
• Undo/redo history.
• All sample rates support.

https://www.voxengo.com/

VoxengoOvertoneGEQ_111_Win32_64_VST_VST3_setup  ( 6.36 MB )

VoxengoOvertoneGEQ_111_Mac_AU_setup ( 10.2 MB )

VoxengoOvertoneGEQ_111_Mac_VST_VST3_setup  ( 19.3 MB )