Just got myself a MIDIsport2x4 interphase and after I plugged it in and all is working ok, the midi in LED is konstantly getting some input (not note on/off) from my motherkeyboard (Korg SG proX).. When I turn the korg off, the data dissapear, and when I unplug the midi cable from the korg, it also dissapears, so something is being transmitted that I cant seem to turn off.
I ruled out the pitch bend, modulation and aftertouch.. and the assignable sliders.

Anybody got an idea what it could be, or know of some sort of midi-monitor program to pin it??