Emu XL-7 & MP-7 User's Group

I've got tis  machine for  years i love it its a beast but i never got to grip's with sum of the patchcord's i kno the basic's for lfo's, destination's, and knob's and midi i just never really got my head around envelope's and crossfade's and changin from one layer to another wit the opening of a filter and stuff like tat its bein doin me skull in for years im tryin make sum nasty dubstepy type music but need them wobbly changing bass's if yee get my drift, any help is greatly appreciated, also sum help for makin sum not so boring arpeggio's! Thanks in advance folks.