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

Hey gang,
I want to share something with you guys that I've noticed about my XL-
7. Last night, I was recording some patterns from the XL-7 onto my 
Yamaha AW16G. I set-up my patterns as pieces of the song - pattern 1 
would be the intro, pattern 2 is the first verse, pattern three is 
the bridge, pattern 4 is the chorus, etc. Each pattern of a song has 
the same drum kit/instruments. I record each drum part on a seperate 
track in the XL-7s sequencer (ie: Kick on track 1, snare on 2, hi-hat 
on 3, etc.). Then, I record the tracks using the same method into my 
Yamaha AW16G. When I record the hi-hats, I've noticed that they don't 
always sound the same when the pattern switches. For instance, the hi-
hat in the intro pattern and the first verse pattern sounds bright 
and "ting-y" (I know it's not a word). When it switches to the 
chorus, it sounds like I've applied a filter to it, because it now 
sounds dull. So I'll start the process again, and the hi-hat will 
sound fine until I get to the third verse (or somewhere else), and 
it'll go dull again. By the time the final chorus comes along - it 
sounds bright again. Now, the difference is sound is not horribly 
noticeable, but it's enough that I can notice it (even if someone 
else might not be able to). I don't know if it's a problem with the 
XL-7 or the AW16G. I've tried switching cables, but the problem 
continues. Has anyone else had this problem? 

I should mention that I only use the Protean Drums ROM for my drum 
sounds. 

Thanks for any help/advice,
Fab