Strange. Can you try this: 1) Connect your Rane 62 2) Open MixEmergency 3) From the Window menu (in the menu bar), select MIDI, to open the MIDI window 4) Click the drop-down menu titles "Select MIDI Inputs" - is the Rane 62 listed there and selecte? If not, make sure that it is selected. 5) Go into MIDI mapping mode in MixEmergency (by clicking the MIDI button on the main MixEmergency window) 6) Click on the Channel 1 Filter knob in MixEmergency (it should be coloured red if nothing is mapped to it, and also open up a new pop-up window) 7) Make sure that the "Learn New Control" button is enabled 8) Move the Channel 1 Filter knob on the Rane 62 In theory, the Filter knob should now turn green, and it should be mapped the Filter knob on your mixer.