MDPE.Application:4.2 - Turn the onsets into actual hand and sound parts

First alternate hands on audible attacks only. Begin with the right hand and continue alternation across the cycle boundary; do not restart the rule at each bar. Three is odd, so the next cycle starts with the other hand.

Here R and L are audible strokes on the respective instruments. The combined onset pattern repeats after eight pulses, but the hand and timbre assignment repeats after sixteen. In one sixteen-pulse span, right-hand attacks are at 0, 5 and 10, and left-hand attacks at 2, 8 and 13. Those two parts were generated by an action rule; they were not inferred from the onset polygon alone.

The ensemble compares this with playing all three attacks on one sound. The single-sound alternative preserves timing and costs less coordination but removes the proposed timbral exchange. In the constructed rehearsal, the percussionist can perform the alternating-attack version at the agreed 72 pulses per minute with the audible reference retained, and the partner musician reports that pulse 6 remains clear. The ensemble keeps it for the next rehearsal because the two-cycle exchange serves that arrangement. This is a stipulated bounded receiving decision, not a measured long-run reliability or a causal claim that the generation algorithm improved music.