Vinyl Surface Crackle

How it's made

Source

dust and small groove defects deflect a record stylus. Fine dust is a bipolar impulse field (18–150 grains/s); larger particles produce sparse 0.12–0.3 ms attacks with 1.5–5 ms noise releases and a short cartridge response.

Body

all impulses pass through damped, non-ringing pickup bandwidths: fine grains 650 Hz–3.2–8.2 kHz, larger pops 95 Hz–3.2–8.2 kHz. The low pop response is a filtered impulse, not a sustained pitched oscillator.

Layers

very quiet 400 Hz-up pink groove friction sits beneath distinct ticks; 32–155 Hz pink mechanical rumble stays centred, without mains hum or subsonics.

Envelope

an eccentric groove breathes at 0.75 Hz (45 RPM). A persistent defect returns every 4/3 s with a short 2–7 ms stylus recovery. Six turns fit the eight-second loop. Random surface events remain irregular between turns.

Spectral movement

slow seeded wander moves the pickup cutoff by +/-8 percent; eccentricity modulates dust intensity and rumble gently, rather than adding pitch.

Variation

independent seeded streams control grains, pop timing, strength, duration, and narrow stereo placement. Dust controls grain density, pops controls larger defects, wear controls bandwidth, rotation controls the recurring defect, rumble controls motor noise, and width controls only the surface stereo field.

Presets

clean pressing is sparse and bright; dusty sleeve has dense fine grains; worn mellow is darker with more body; runout groove emphasizes the recurring scar. Dry, with no room sound. Output loudness is -33 LUFS to retain transient headroom.

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