Quick tutorial for anyone who isn't familiar with the music gear being emulated: The top two items are two instances of an imitation of a Roland TB-303 basslin

Quick tutorial for anyone who isn't familiar with the music gear being emulated: The top two items are two instances of an imitation of a Roland TB-303 bassline synth. The bottom item is an imitation of a Roland TR-909 drum machine (a drum synthesizer). Press 'Play' in the top left to start all three instruments playing. Each is now running through 4 bars of 4 beats, or 16 steps in total. By default the first bass synth is playing a low 'C' on every step, the second bass synth is playing nothing, and the drum machine is playing a bass drum on the first step of each bar (steps 1, 5, 9, and 13). Laying out a pattern on the drum machine is a little more intuitive, so start with that. The row of 16 buttons represents the steps on which a hit will be played for the currently selected drum type. Buttons for switching modes to edit the pattern for each drum type are listed horizontally (BD, SD etc). Switch to a different drum and add some hits to the pattern by clicking on those steps in the row of 16 buttons. The bassline synths are programmed in basically the opposite way. The 16 steps become the modes you switch between (by clicking the UP and DN buttons under 'Current Step') and clicking on any of the the 13 musical note buttons (coloured like piano keys) will select the note which plays on that step. The highlighted note can also be deselected so that no note will be played for that step. Try stepping through and changing the notes which are played on each step or deselecting notes to create a more interesting rhythmic pattern.