I just made a comment above controlling the performance swithc with MIDI CCs on another thread: http://forum.eventide.com/cs/forums/t/9468.aspx
But to repeat myself, basically after looking into the performance switch some more, the behavior seems to be inconsistent when its triggered by MIDI CC. With PitchFactor algorithms it seems to expect the MIDI CC value to be above 64 to turn it on and below 64 to turn it off, but with TimeFactor algorithms for instance it expects the MIDI CC value to be above 64 to turn it on AND off. We're going to have to look into this some more…
