What MIDI controllers can I use to automate MachFive?  
You can use the following MIDI controllers to automate these MachFive items: 
07 : Part volume 
10 : Part pan 
11 : Relative part volume 
71 : Filter resonance 
74 : Filter cutoff frequency 
75 : Overdrive 
76 : Coarse tune 
77 : Fine Tune 
96 : LFO 1 rate 
97 : LFO 2 rate 
You can also select the Modulation Wheel or Breath Control (MIDI Controllers 01 and 02) as a modulation source. 
Additionally, in the Part section you can specify any MIDI controller you want as the "External Control" (Ext Ctrl). You can then assign "External Controller" as the source for any item that you can modulate.