The SMS noise is weird, to prevent the noise taking the 3rd square channel, just simply use this for drums:
C-4 - 1 2001
C#4 - 1 2001
D-4 - 1 2001
Hope this helps!
Yet another new software for me. 1st attempt. Spent a little while making some noise drums for the 2nd loop only to find that it took away the 3rd square channel (I didn't spend more time trying to work out how to make good percussion on the 0 noise channel setting)
Anyway, looking forward to more SMS jams though!!