oi
 
> I want to set up a drum kit and a pattern in LMMS.
 
well ....  you *might* be interested in ardour controller made by João Pais ----> http://puredata.info/downloads/jmmmp/releases/0.46
You could set up dem tracks, mute, unmute, move between markers, record, compose routings with jack, set up transport speed......
OR .... you could get renoise (like real dawg :P ) and base your set up over OSC. 
 
yo