Jump Scare

How it's made

Source

a sudden bow-pressure burst excites a stylized scraped metal/string cluster, not a voice. Band-limited saws carry friction harmonics; independent filtered noise adds the irregular scrape.

Body

five inharmonic fundamentals at ratios 1, 1.061, 1.177, 1.414 and 1.53 around 0.7-1.6 kHz. Each bends up 13% in 25 ms then collapses to 72%; independent 25-43 Hz flutter models stick-slip.

Layers

a 3 ms air attack dies in 120 ms; a 125-to-48 Hz membrane thump supports the onset. Moving broad noise resonances follow the cluster, while a closing low-pass absorbs high harmonics.

Envelope

4 ms cluster attack, no sustain, steep decay to 14% at 0.24 s and 1% at 0.72 s. A faint residual friction tail ends at 1.4 s by default, followed by a silent termination margin.

Variation

seeded tuning +/-0.7%, flutter phase and independent noise; pitch, spread, scrape and body weight distinguish needle, tearing, heavy and clipped stingers. No room reverb is embedded.

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