I haven’t used the A4 in particular with a band, but I have used electronics with a band for many years. Theres basically 2 different ways that you can integrate your electronics.
- don’t use sequences and play everything- following the drummers timing.
- Find a drummer who can play to a click track and have the drummer follow the sequencer.
I’ve tried to do something in between, by using triggers to set the tempo of a sequencer in realtime. This has pretty much always ended up in failure- (at least for me).
Maybe it’s possible with the right gear and the right setup- but in my experience option 2 (drummer following click) was always easier and sounded better.