Once upon a time I did a PhD in Unpredictable Popular Music. The patterns included in this worksheet were created randomly using MAX MSP.
They explore random linear sequences for the hi-hat, snare drum and bass drum. Although they are all 1 bar in length, each one may be repeated any number of times, either by itself or in combination with two or more sequences to produce a longer pattern. It should be noted, however, that longer sequences (e.g., playing through all 12 patterns!) will sound a lot more unpredictable than shorter ones. Repetition will help reduce this effect, for example, a four bar sequence could contain patterns 1, 2, 1, 6.
The sticking patterns should be followed exactly and memorised. Ideally, the player should learn to move between each sequence in any order, thus increasing the perception of unpredictability.Download the PDF