4 modulators (generated by the 281e & 266e) go into the 250e external input and are used for timing modulation. This makes the small inner circle timing knobs selectors for the 4 inputs and ends up in a pseudo feeback loop controlling the timing on the 4 steps. The 4 steps are stupid simple (output 1 is on for all 4 steps, output 2 is on for just step 1), but the modulations reprogram the timing as well as modulating timbre, then hilarity ensues.
