control my lxp15 & spx90 thru midi??

i was hoping i could control my external hardware lexicon lxp15 & yamaha spx90 with cubase thru midi (or if necessary some other software from my mac??)

hope some one can tell me more about this?
can’t really find it (maybe cause i don’t know how its called)

grtz bob

dont know about the lxp but the spx90 may be patch select only IIRC

Pleas crarify, WHAT functions are you trying control on these specific species of hardware.

well it would be nice to control decay, delay, rev time, and it would be awesome if i could select and presets ? (but i don’t know if thats possible thru midi