Heavy Lever Pull

How it's made

Source

an iron lever rotates against a loaded pivot; band-limited friction excites a bending groan. A 3-14 ms stop impact at 0.58-0.78 s releases a spring and a softer pawl rebound 24 ms later.

Body

iron modes at 138, 287, 511, 893 and 1471 Hz decay in 0.10-0.30 s; upper modes die first. The mounting block adds a broad 95-180 Hz knock, rather than a pitched sub-bass boom.

Envelope

12 ms onset, uneven rising effort, brief release into the detent, then a damped ring. All layers fade to silence by 1.13 s; the dry one-shot is bounded at 1.23 s.

Modulation

pivot groan rises from 105 to 165 Hz with tension, with irregular slip and weak harmonics; friction opens from 650 to 2200 Hz. Spring modes bend down over 45 ms as tension settles.

Variation

seeded tuning +/-2 percent and lock timing +/-8 ms; travel, mass, friction and spring controls yield standard iron, rusty resistance, lubricated machinery and a spring-loaded latch.

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