OP-1 is master and on beat match mode. OP-Z is set to receive clock and MIDI all other settings OFF… this cable connects them: https://www.amazon.com/d/USB-Cables/Cable-Matters-Mini-USB-C-Black/B00UUBS0SS
I cannot, for the life of me, get these two machines to start at the same time. The Z’s four green lights in the tempo section are flashing constantly at the silent rate sent by the OP-1 that is unaffected by the start button (but consistent with the tempo number). In other words, even though I am pressing start, the OP-Z is synced to some other MIDI signal that is indicated by the flashing green lights and NOT by the play button.
I desperately want to use these devices together without spending ANOTHER 100 dollars on a mess of metal to reconcile this investment + to nullify their portability.