Same thing with with mC1, not in Arpeggiator's list, is it definitive?
edit
Solved, with Polac's internal midi and send option, IX split and CyanPhase mC1 works like a charm with Jeskola Arpeggiator


On my computer, split plays notes around 80ms before mC1, but with a delay we get synchro, cool, split + arpeggiator is great.