> It is complete mistery to me how velocity parameter in Cubase can have an
> impact on Gate signal forming in MPU.
Perhaps the MPU "translates" the velocity value in the voltage level of
the gate impuls (this would be a dream for e-drums!). Try what happens
if you set the velocity to MIDI-Value short above 0 (1 or 5)
If the MPU does not produce a trigger in teh A-100 I might be right.