Ultimately, other synths, eurorack (through a converter) possibly even ableton, but the point is I have been monitoring midi out from the octatrack isn’t sending midi messages at all on any of the channels. This is the first time I have tried it so looks like the unit is defective.
Do you have a midi keyboard going midi in to the Octatrack, and midi out to your interface? What are you trying to play? If you look at the upper left part of the screen, you
Should see a dot above left for incoming midi ( midi keyboard), and upper right dot is midi messages going out. If you don’t see the upper right dot, you don’t have out going midi.
It looks like it’s above the the BPM on the screen.
test against another midi device if available - also look at OT midi out pixel, just in case
test OT with din midi loopback - midi LFO to audio destination
din midi uses an optocoupler on the in port, if anything midi wise was going to go wrong i’d first start suspecting the In device (particularly if it was a small portable inline one like that - had issues with similar myself)