When I was using 32 bit Plainum there were quite a few 32 bit Midi FX, but seems like there are few 64 bit Midi FX available. I need a controller FX to work in real time, so my volume pedal works the same for 2 soft synths. Ntonyx has a good one for 32 bit, but not 64 bit. Any suggestions?

These are all 64-bit now I think:
http://www.tencrazy.com/gadgets/mfx/
 
 

lfm
These are all 64-bit now I think:
http://www.tencrazy.com/gadgets/mfx/
 
 

I see they do have a 64 bit version now. I'll check it again, but last time a few years ago I checked it with 32 bit and it didn't do the controller adjustments in real time. 

gmp

lfm
These are all 64-bit now I think:
http://www.tencrazy.com/gadgets/mfx/
 
 

I see they do have a 64 bit version now. I'll check it again, but last time a few years ago I checked it with 32 bit and it didn't do the controller adjustments in real time. 

I mostly used to replace CC#11 over to CC#04 foot pedal - and it was always live/realtime - even 10 years ago.
I also used midi monitor which is one version for live input and another for playback monitoring.
 
Maybe some others differ and don't do live input and only playback, can't tell.
But using monitor for live you can check.