BeatSketch is a four voice drum synthesizer. You have the power to design a Kick, Snare, Hat, and Tone voice – making up a minimalist drum set. The MIDI notes C3, D3, E3, and F3, are mapped to these drum voices respectively.

On the right, there is a randomization system, which uses a interpolated gaussian distribution as a modulation signal. Every element (except for volume and panning) of each of the voices is modulated by this signal when attenuated in. Experiment with attenuation amounts to get the most natural or unexpected sound.