I think (not tested) that the a4 can change patterns, the same way af machinedrum and monomachine… it has something to do with setting the base-channel the same on all elektron machines… if you change pattern on octatrack. the monomachine and machinedrum follows…
I think (yet again untested) this switch is because of the pattern change sends out a program-change message, which selects a difrent pattern…
the emx has the same behaviour (well my other elektribes did).
So thats a way to “keep it all together” … in reality:
I wouldnt gig with to many boxes… the more simple your setup… the easier it should be.
and I would resample my external gear… then play the sample… and switch patterns manually… and slowly mix in the new pattern…
to make it even more simple : If I would go out and gig… I would do some ot-only stuff… just show up with a bunch of patterns… which I practiced allot on… all set to do what it should do… Especially the first few times.
Its a rush to do things live… experience should relax you a bit… and gives space for more machine…
Good luck buddy…
and I hope you get more and better tips 