I use Volumetric https://github.com/Udart/volumetricapp
You can use it to target specific regions of the spectrum and send this FFT to different midi/OSC channels.
+1 , or even if we could just split between Left & Right that would make a huge difference , also imo the FFT input works better in resolume 5 , i almost stopped using it in resolume 6 i don't find it working well (clean input from mixer into line in) :s