Body Blow

How it's made

Source

a fist (about 1 kg effective mass) hits a clothed torso; the padding of cloth, fat and muscle turns the contact into a 6–15 ms low-passed push instead of a click, so there is no crack above ~1.5 kHz.

Body

the chest and abdomen act as a damped cavity at 70–120 Hz (a short sine thump that sags in pitch by about 40 % as the tissue compresses) plus a second hollow resonance near 1.7–2x that frequency.

Layers

low thump (sine drop), padded slap (brown/pink noise below 350–900 Hz), cavity resonator on the slap, and a faint cloth rustle (band-passed pink noise, 700–1500 Hz) that follows the impact by 15 ms.

Envelope

attack 4–5 ms, body decay 90–140 ms, slap decay 45–75 ms; the whole event ends near 0.3 s.

Variation

`rng` shifts the thump pitch ±4 %, the slap colour and the rustle band; `weight` sets mass (lower, longer thump), `padding` the muffling, `chest` the cavity resonance, `cloth` the rustle level.

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