Hi!
Yeah must be reaper´s midi mapping, I don´t use reaper so I´m not sure but you might be able to edit the options in the mapping and invert it or something…

I´m using my own USB MIDI Host to transform the QuNeo USB in to a standar 5 pin DIN. As you say the QuNeo spits out for sure the right increasing value, I also checked with a MIDI-Pal that I have to Monitor MIDI streams and values are Ok.

Never recorded the OT´s Midi output, interesting result. Try sending the CC 48 value from another MIDI controller or DAW, and see if the crossfader behaves as expected.

Good luck!

[/quote]
I think I am going to want to buy a ‘cerebel USB’ box from you multiman!!