FL ---> audio interface outputs---> zoom's external input jack.
yes, i already tried sending FL's metronome---> mixer track---> audio interface output---> zoom's ext input, but for some reason the tempo does not change ...
FLStudio 11 to see if the patcher in that version worked and it did with some setting adjustments. I did not see these settings in FLStudio 12 so that would be a good thing to add/fix as well ...