thanks, v2.5 took care of lambda ASIO dropping off, I found the stereo monitor button hidden in the front middle area of the unit

but MIDI playback still in-op thru USB, kicks right in when internal synth is selected as output. I have verified cable is good, unit triggers from a different controller, and correct midi channel is selected. I have ignored midi device manager, as it appears not relevant to the trigger issue. Could it be a hardware issue? I happen to live in the SLC area right down the street from Sandy, wonder if I can stop in and they could bench test the Lambda unit?