Per the manual, C3 to D4 are assigned to the 24 patterns for any given engine. You can also access specific "scenes" via MIDI note control. Check the PDF file "Guru 1.5 MIDI implementation", it lists all of the MIDI assignments. Should work with data from your sequencer just like it would with realtime input from a key controller.
i wanted to know if there is a way to visualize the different patterns of guru ( while guru is playing>) without triggering them, just to press the pattern key on guru's interface and see them, whithout interfering with the song playing