This evening I was trying to use my Sub Phatty to control another synth that was out of reach. I went through all of the shift-mode MIDI settings, but it wasn’t sending any notes. I checked on a couple of other MIDI devices, including a MIDI monitor. What worked: pulling out the MIDI in cable. When I did this, MIDI out sent notes and wheels beautifully. But when I plugged the MIDI in cable back in, it stopped sending MIDI out.
Is there something I can set to fix this? I tried enabling MIDI thru merge (both DIN and USB) but that didn’t seem to make a difference.
I don’t think it was a loop, since MIDI was terminating with the other synth (a Microbrute, which has no MIDI out DIN). But I checked to see what the Sub Phatty was plugged into: a 2x2 MidiSport. The MidiSport was turned off (to prevent MIDI loops on a different synth, actually), so I turned it on and the Sub Phatty started transmitting notes again.
I’m not sure how to explain the result, but perhaps this will help someone else.