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

hi all
      
  first i have to say i love my xl-7, ithought to buy a groove box and i got a synth. 
  i'm quite new to sound programming and have many things yet to discover
  now 3 questions for the experienced ones in synth programming :


  1
  on some presets one the xl'7, when i "un-hit"(sorry i don't know how to say it in english, "relache en francais") a key, there's a sound that happen : is that a modulation parameter?
  i mean it seems to be linked to the release stage but i didn't find how to reproduce it.
  if i'm not clear sorry, it happens for example on preset 59-3 of the rom, "wicked low"
  hope you understand better now.

  2 about the release in the enveloppe.
  imagine i have a sequence and i want the release happens ONLY on the last note, or when i mute the sequence (no "note on" any more)(if you know fruity loops i can do it with the "cut itself" on samples).
  is there a common way to do this? without to have to turn the knob.

  3rd one
  i still don't understand how to use the lag processors and other cords like sum abs(what's that?)
  do u know where i can i find a good explanation
  no need RTFM, please

  if NE1 can answer at least one of these question that'll be already great. thanx much


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