Midi faders and encoders

Hello! I’m looking to add something like an akai apc40 to a pc rig for control over midi. To test some of this, I fired up my novation impulse 49 which has some faders and some infinite spin knobs I thought would be good for controlling the encoders. Well, I never got the faders to work at all and the knobs I could make talk to the hog encoder wheels, but only a small range. I did have to change the mode from7 bit absolute to 7 but relative but it was only changing part of the intensity encoders value range. 0 on the midi knob wasn’t 0% on hog and 127 on the knob wasn’t 100% on hog. What am I missing? Do I have to have something bomes midi translator or is there something I’m doing wrong? Thanks in advance!