"Little Drummer Boy", also known simply as "LDB" is a software to Create drumloops. I must emphasize, that the goal of the software is to create drumloops. It is not a drummachine simulator, it is not a realtime program, and it does not have sync, MIDI support, or anything like that, nor is it intended to have.
You use it to combine WAV samples (stereo or mono, any sample rate) and Stomper sounds to a combined sample, with processing (distortion, decay, stereo spread, resonant filtering, with full parameteric morphing based on accent levels), pitching (with glide, so you can simulate 303 or other oldschool synth if you like), into a Combination sample, intended to be used as a "drumloop" [which can contain a lot more than just drums, btw!].
To actually USE the samples made in LDB you should use other software (Cubase, CakeWalk, Making Waves, Rubber Duck) or hardware (your sampler, AWE-32, e.t.c), or whatever.