Have you tried using multi maps on the A4 for changing patterns from DAW? I find it way more intuitive and flexible then program changes. You can for example control both transpose and pattern changes using midi notes.
Posted this a while back on this topic: http://www.elektronauts.com/t/multi-map-to-transpose-and-switch-patterns/4815
[url=“Multi Map to transpose and switch patterns”]Never tried on the A4, but I tried to use midi notes to change patterns with my MD and It was to difficult to manage…
I will take a look, I hope it is better handled on the A4.
Thanks LarsErik