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

I'm really new at this. I just got my XL-7 yesterday, and am working 
my way trhough the manual, which is impossible because I stop every 
two mintutes to play around with the XL-7 for 2 hours. Anyway I 
hardly know any terminology. 

If I am sequencing sounds that are on another device with the XL-7 
do the keypads control the sounds on the other device, and will a 
whole octave of the sound be on the keypads even if it is just one 
note on the other device?