A hat patch becomes a cymbal by lengthening the envelope decay time

The physical difference between a hi-hat and a cymbal is primarily sustain: a closed hi-hat has a very short decay; an open hi-hat has a longer one; a ride or crash cymbal has an even longer tail. In a synthesized percussion voice, this maps directly onto VCA envelope decay time. The same noise-bandpass patch that makes a hi-hat can be stretched into a cymbal simply by increasing the decay segment, with no other patch changes required. This generalizes the single-patch approach: one voice design covers a family of metallic percussion.

Examples

Closed hat: VCA decay ~10 ms. Open hat: VCA decay ~200 ms. Ride/crash cymbal: VCA decay 1-3 s. All other patch parameters held constant.

Assessment

Given a working closed-hat patch, describe the single parameter change needed to make it sound like a crash cymbal. What secondary parameter might you also adjust to alter the tonal brightness of the cymbal tail?