Hi... the setup I'm having trouble with is super basic. Alesis VI49 controller keyboard MIDI out connected to Motif-Rack MIDI in. The controller gets power from a 9V AC adapter, there is NO computer/USB involved. Motif-Rack is set to receive on MIDI channel 1 and the controller is sending on channel 1. The controller is also set to send MIDI via USB and DIN.
The problem I'm having is that the Motif-Rack frequently does not receive MIDI messages from the controller, as evidenced by the fact that the green light above the Voice button does not respond to key on/key off messages from the Alesis. Occasionally it does work, in which case the green light responds to key events and the Motif plays the selected voice as expected.
That's it... a very basic setup that seems to work inconsistently but I have been unable to pinpoint what makes it work when it does work. Both pieces of gear are in like-new condition. Could it be possible that the 9V power adapter on the controller could cause an unreliable signal if it is sending 400 ma instead of 500?
Thanks in advance for any advice....