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

Hi everybody

My english is not perfect but I will try to explain what my problem 
is :

I'm playing on xl7 with two others module : a Jomox Airbase on midi 
A and a nord modular on midi B.

Part 9, midi channel 16A, there is the kick : the XL7 is sequencing 
the jomox, and it's playing normaly.

Part 6, midi channel 6B, I want to control my modular and to play a 
pattern arpegiator with a blank preset. I select a blank preset, and 
my modular patch, and try several arpege pattern.

When I select some arpege pattern (climber, speed jumper and few 
others), suddenly, there is a change on part 9, like a big boost on 
my kick, like a big accent, or big low boost... 


It's strange, how selecting a pattern arpege, without playing it, on 
part 6, could change the audio of part 9????

Is it a bug????