With a midi processor, if you map any midi message to Stop / Prog Change / Play, so you have instant pattern change. Works with OT, pretty sure it works with all Elektrons.
I’ll try later with AR and A4, I have something bigger :
Not sure about others but OT / A4 / AR responds to SPP (Song Pointer Position) in song mode.
I could map midi notes to SPP, hence directly play any step of a song (Arranger in OT), or change patterns with direct jump, quantized to steps. Works like a charm with OT.
Cheap working example : 4 arranger (song) rows, same pattern, 4 different scenes (pitch). A midi track with arp change arranger rows randomly, on step 5 and 13. Direct jump.
Can’t wait to test with the Dark Trinity, it should work similarly, I should be able to transpose on the fly the 3 machines, playing midi notes, short breaks, arpegiate patterns, etc…