Hey Scott... Alas, I am a monkey. I downloaded Reaper and as I was setting it up.... it hit me! I'm using a MIDI interface (Fastrack c600) with ProTools... BUT, I also had plugged in the USB cable into the computer because we use the PX5s editor. Protools must have been getting MIDI data from both and not liking it! When I unplugged usb cable from the back of PX5s, the MIDI outs of the PX5s recorded as they should. I'm wondering now if there is a way to leave both the MIDI cables for recording and the USB cable for editing in the studio. Either way, I can't tell you enough how I appreciate your assistance Scott and your suggestions. It was when, at your suggestion, I was installing Reaper and it asked me to setup connections that it hit me. So you were a great help! I appreciate your time and efforts. And although folks are saying the PX5s is the best "under $2000" piano/controller/synth.... around here, we're starting to think it can't be beat at any price! Love that thing. You take good care sir. Billy