The sequencer has 16 tracks, with each of them having 4 phrases of 16 steps (or you can set it to be one extended 64 step sequence, or anywhere in between)
For tracks 1-3, they are reserved for note sequencing, but the remaining tracks can be routed to any other parameter in the mod matrix, allowing you to set per step parameter values. You can also record in real time - If the sequencer is running, just hold down record and turn a knob, and you'll see a track will be auto assigned for that parameter, and the values of the knob will start recording based on your knob turns.
You can develop a lot of motion with the Pro3.