velocity knobs

[host]

Hello there,
my beatstep pro is connected via MIDI and a thrubox, to volca beats (CH10), volca keys (CH3), microbrute (CH1) and streichfett (CH2).
Every thing is working well except the velocity regulation, with the knobs (pitch and gate are ok)!
Strange is that on the volca keys the velocity knobs are working but not on the other 3 machines!?

I have no idea what's the issue, i tried to connect directly whiteout thrubox, i tried to connect the microbrute with traditional cv gate connection too, but nothing...

Hope someone can help me, thanks.

..sorry for my english..
host

[Steinberger]

I do know that the Volca Beats, by design, does not respond to velocity.

[host]

thx Steinberg,
 i found more informationes on internet and unforunately it seems that microbrute, volca beats and streichfett does not respond to velocity via midi.