RHY.4:5 - Archetypal Grounding

RHY.4:5.1 - Correcting a slowly rising sound

Assume a constructed sound trial uses a beat at 500 ms. The sound’s acoustic start is at 500 ms; repeated click-alignment judgements place its perceived location near 540 ms under the chosen listening conditions.

A candidate correction starts the unchanged sound 40 ms earlier, at 460 ms. If the perceived offset remains the same, the predicted location is 500 ms. Replay checks that prediction in the passage. Changing the envelope instead would require a new estimate.

The arithmetic establishes the predicted shift from the stipulated inputs. It does not establish that every slowly rising sound has a 40 ms offset or that a different listener will make the same judgement.

RHY.4:5.2 - Contact, load and a partner’s continuation

In a constructed partnered exercise, both dancers agree on the musical target, but the follower cannot continue comfortably from the lead’s transfer. Video shows the foot contacting the floor before the target. That observation does not settle when loading becomes usable to the partner.

The pair selects a familiar, comfortable next step as its receiving task. The usable-arrival criterion is whether the follower can begin that step at the agreed musical point without an extra pause or recovery. They compare the original transfer with an already learned version whose preparation begins earlier while its foot contact remains unchanged.

Complete this constructed case with stipulated observations: the original transfer leaves the follower needing an extra pause; the revised preparation permits the agreed continuation, and both participants retain comfortable support. Keep the revised preparation for this passage and these conditions. Advancing foot contact again is not selected: its timing was unchanged between the two versions that gave different usable results.

The case ends in a qualitative local choice, without estimating a universal offset or substituting a force peak for the partner’s response. These stipulated observations illustrate how the decision follows; actual use needs the corresponding response in the performed task.

If the task remains unclear or the adjustment exceeds the participants’ technique, obtain suitable instruction rather than trying to force an earlier or stronger transfer.

RHY.4:5.3 - A command timestamp hides delivery delay

A constructed interactive instrument logs a command at the desired beat, while its acoustic output begins later. Microphone and controller timestamps are first brought onto a usable common reference. If the delayed physical output is the relevant problem, the developer can adjust scheduling or the output path and replay the task.

If the physical delay is removed but a soft sound still seems late, the perceptual question remains. An engineering latency correction and a perceptual alignment answer different parts of the relation.