AHD in private/src/AHD.hpp evaluates attack, hold, and decay from absolute modulated global phase. At a trigger, its input captures:
The running envelope computes:
samples = abs(globalPhase - startGlobalPhase) * phaseRatio * envelopePeriodSamples
It does not retain a source loop index, track topology edits, or reconstruct winding. A multiplier or parent edit during attack, hold, or decay cannot change the captured timing. Retriggering captures the new timing. In the production voice path the source ratio comes from loop 0; the voice cycle ratio used to calculate the envelope period is a separate quantity. That voice ratio is the undoubled LCM of the selected clock and read loop ratios, and envelopePeriodSamples = globalPeriodSamples / voiceCycleRatio. The gate still closes after half a voice cycle; the Theory of Time rhythm advances once per complete loop cycle.
The absolute distance preserves existing reverse behavior: moving back toward the trigger retraces the envelope while it is running; moving past the trigger increases distance again. Once decay reaches idle, moving backward does not restart the envelope. Explicit release uses the existing sample-driven decay.
Attack and decay controls remain sample-based increments. Hold is configured in loop periods (m_holdLoops) and converted with the captured envelope period during evaluation. Live hold changes therefore remain available without accidentally adopting a new topology’s period. Tempo or phase modulation changes global phase motion and consequently envelope progression.
Physical-model presets can have shorter or longer holds after this change. Previously, the slewed control setter converted hold using a temporary input’s default 48,000-sample period. It now slews the loop count and uses the period captured at the trigger, like the other envelope sources. With a 3,000-sample captured period, the same hold knob setting produces one sixteenth of the previous hold duration in envelope sample units. Attack and decay mappings are unchanged.
AHDControl carries trigger, release, source phase ratio, and envelope period. It no longer relays an elapsed-sample counter from the gate. See Multi-Phasor Gate for how the voice period is captured.