Voxengo has updated Soniformer to version 3.7 update. Soniformer is a spectral mastering dynamics processor plug-in designed for professional music production applications. The new version adds Pro Tools AAX-64 plugin format support.
Every parameter in Soniformer is defined by means of a graphic envelope which is freely-modifiable and may contain unlimited number of control points. Beside usual threshold, attack, release and compression/expander ratio parameters Soniformer offers the user control over "stereo width" and "panning" parameters making Soniformer an effective tool for stereo field adjustments.
Features:

• 32-band dynamics processor.
• Envelope-driven parameters.
• 32-band "analog" spectrum analyzer.
• Stereo balance and correlation meters.
• Multi-band panning.
• Narrow-band sweeping.
• Stereo and multi-channel processing.
• Internal channel routing.
• Channel grouping.
• Mid/side processing.
• Up to 8x oversampling.
• 64-bit floating point processing.
• Preset manager.
• Undo/redo history.
• A/B comparisons.
• Contextual hint messages.
• All sample rates support.
• 11 ms compensated processing latency.

Price: USD 89.95. Demo version of Voxengo Soniformer and other pro audio plug-ins can be
downloaded at the Voxengo web site.

isnt' this one notoriously cpu hungry?
 

Not particularly. It's intended to be a mastering effect anyway.
 
My experience with Soniformer has been that it takes a fair bit of fiddling to get the results you're after, but once dialed in it's a multi-band compressor on Red Bull + steroids. A very good plugin - IMO - that can do things that more conventional multi-bands cannot.
 
OTOH, I don't actually use it myself anymore. Those kinds of spectral smoothing duties are now performed with less fuss by MSpectralDynamics.