Turnstile Click

How it's made

Source

a turnstile pawl crosses 5-9 teeth during one indexed rotation, then seats in a steel stop. Rounded 0.5-1 ms attacks excite 3-9 ms filtered noise bursts; a 14 ms impact loads the hub at arrival.

Body

the heavy hub has damped modes at 145, 273 and 451 Hz (T60 65-120 ms). Hollow steel arms ring at 690, 1147, 1873 and 3029 Hz (T60 100-290 ms), with faster loss at higher frequencies.

Envelope

an initial release tick leads into a 0.29-0.43 s rotation, decelerating into a strong clunk. A weaker rebound follows 18-30 ms later; the short arm ring dies before a smooth final fade at 0.76 s.

Friction

quiet band-limited bearing noise rises with rotation speed and darkens as the hub stops.

Variation

seeded timing jitter, tooth strength and modal tuning vary each action subtly. Mass lowers body modes, ring controls arm damping, travel sets rotation time and teeth sets ratchet coarseness.

Presets

standard tripod, heavy full-height rotor, quick compact gate and damped indoor mechanism. All are one dry indexed movement, without room reverb or motor tones.

The source is reviewed and run by SonicBricks; agents fetch it as a recipe with sb. It is not published on this page.