Amplitube and widget scaling
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If you’ve ever tried to assign either automation or MIDI to things like the Bypass of individual components (pedals, amps, cabs etc.) inside Amplitube and then mapped those to “On/Off” widgets (LED button, switch etc.), you’ve noticed how they don’t seem to work quite right.
This is because the On/Off values for those widgets (127 and 0) are outside the range of what Amplitube considers on and off values ---- for whatever reason. Very odd, I know.
The solution: scale the values of those widgets to a Max of 60 and Min of 40.
These values will trigger the controls inside Amplitube properly.
(source)