noise issues - not a "problem" but an issue

["JAMES FOWLER, III" <jimfowler@prodigy.net>]

i'm trying to do this thing: in loop mode, play a note and then hit record so the note has no attack...it just appears.  i usually let it ring and the loop ends up being about 10 seconds long.  invariably i have some significant noise build-up.  it creates an interesting effect (all the notes are placed at random) and i'd love to use it but the noise issue makes it borderline unusable.  any suggestions for working around this?

thanks.

-jim