Turning off touch sensitivity on the KeyStep 37?

Just got a KeyStep 37! As it seems to be the best keyboard for use with mini-synths like Volca and Aira Compact.

Started experimenting with it, but was finding it very hard to play due to the touch sensitivity (which I think is the same as "velocity"?). Would need to play the keys pretty hard for all the notes to have the same sound/volume.

Tried looking in the user manual, tried doing some Googling, haven't found a way to actually turn if off. So how can it actually be turned off?

Figured it was worth asking here, as a lot of Volca players do seem to use this keyboard. So hopefully someone knows.

Thanks a bunch for any help!