RHY.1:4.3 - Choose a contrast that separates the alternatives

Repeat a manageable passage while changing one consequential condition. For example, keep the sequence and pace while changing the sound used for an accent; compare the transition with and without its ornament; or compare the same movement alone and with a partner who must respond to it.

State what each result would change. For a sequence/grouping question, recover the events and order first; if they match the required sequence, change only the grouping or accent cue and compare the entrance. A corrected sequence and a corrected grouping answer different remaining difficulties. For a timing question, compare the physical event with the moment the recipient can use it: a late physical event calls for production or delivery correction, while a later usable cue despite an on-time event calls for the receiving-timing comparison. If both versions drift progressively, inspect pace or reference correction. If only one timbre seems late despite the same physical start times, inspect the sound’s temporal shape and the listener’s alignment in RHY.4. If the basic motion continues until an accent is added, inspect their coexistence through RHY.3.

Keep the conditions needed to reproduce the difficulty. An isolated slow action may reveal a constituent skill, but success there leaves its use at performance speed unresolved. Conversely, do not force a full performance when a simpler, comfortable comparison answers the present question.