Just thought I'd share something I recently found,

It's called Filter Shaper

Basically, this is a filter that can be assigned as an insert, allowing you to modulate so many different options on your channel, in the same way that Massive does with it's Step Performer.

You can make these changes with automation I guess, but this simple plug in means you can you draw in a complex pattern to effect the Attack or the Frequency or the Resonance or anything you want, having it change over time, I can't explain how much fun this is, especially on long techy bass notes..

Check it out it really is worth giving a go if your looking for a way to give your bass, pads or pretty much any sound some real unique movement

http://www.cableguys.de/filter-shaper.html