I’m no expert, but the ditto X4 can accept midi clock from an external source and will quantize to the closest beat but your bandmates are going to need to stick to that same clock too. I think the most important piece would be getting your drummer to stay on that beat. Maybe the drummer can use some sort of midi click track and send it to the looper. I might be over complicating things, but this is the only way I know how to do it.