playing more than 1 drm pgm

we know the manual is not super good, and its my fault 4 being too high right now....but i cant figure this one out.... i got 4 pgms loaded... where do i go from here.... to play like 2 of them at the same time...do i gotta not have sounds from each pgm on the same corresponding pad? i never really needed to use this i guess, or see why someone would... which is why i wanna try it...


p.s. . . this past year ive at least tripled my xl knowledge and trickery, and i still aint know shlt.... help a bruva out....