Yes, the only way to change sequences is by hand, disappointingly, there’s no “song mode”. I don’t believe you can change patterns with MIDI messages either. I use the sequencer and matrix arpeggiator a lot with short patterns and transpose them with the keys, and the record the keys in the daw or midi sequencer. There are some cool iPad midi sequencers if you have one of those around, even an old one- StepPolyArp, Xequence 2, MidiSteps, Xynthesizr. Playing “chords” into the matrix arpeggiator is fantastic, with the last two apps- you can step through the chords slowly, like 1 measure per step, while having a fast sequence on the MxB.