Low input volume from Monotribe in Kaoss Pad 3

[jack-szu]

I've connected my Monotribe to a Kaoss Pad 3 then to a Scarlett 2i2 interface.
The input volume in the Kaoss Pad (coming from the Monotribe) is very low. I've tried raising the level of the Monotribe and increasing the input volume on the KP of course but it's still very low.
All this on Filter 1 setting and most other settings HOWEVER on some of the other effects settings the volume suddenly gets very loud.
What could be causing this?

Any suggestions would be welcome