I have an open technical request into Arturia on this but not resolved. No matter what I try, I can only get the Keylab 25 to transmit on midi channel 1. Has anybody else had this issue - figured out a work around? I am using a Mac Pro running Mavericks and when I open the Audio Midi Setup utility it recognizes the Keylab25 but when I try and edit it by double clicking the icon the Port options are grayed out. Otherwise the unit works fine.
I also have a Midi Express XT plugged into a separate USB port and am having no issues with it's function since adding the Keylab.
Any help is greatly appreciated.