Yes, I realised after I hit send that this was poorly articulated. The scenario was of trigger outputs from a MakeNoise Tempi firing slices in individual sample players, themselves within mixers, in order to simply use the trigger from the Tempi coming into Ax-Dx inputs on the ER-301. I was trying to conceive of a manner in which only those signals could be used to fire different slices in one sampler, rather than 4, ie a way to identify the input and advance the slice position from the triggers alone.
Does that make more sense?
Of course, again poor articulation, but those are references within the lua file to sample and position, yes? And not saveable from computer in the manner @jonsimon was suggesting in his underlying idea above?
And as ever edit: I did subsequently think that the scenario I was asking about would probably run into polyphony problems even if it were possible.