Conveyor Belt

How it's made

Source

a rubber conveyor running over steel idlers; motor rotation at 58-82 Hz, with electrical hum at 100/200 Hz, bearing noise at 180-950 Hz and rubber friction at 600-4200 Hz.

Body

the roller shells and frame colour short contacts at 310, 730 and 1640 Hz; low-Q bands and 18-95 ms decays keep the metal dry and damped by the belt rather than ringing like a bell.

Rhythm

3-9 roller contacts/s; every sixth contact is a belt splice, with a second contact 24 ms later at the adjacent roller. The 6 s standard loop contains whole roller and splice cycles.

Envelope

continuous motor and friction beds; roller contacts rise in 2 ms and decay in 18-40 ms, splice thumps rise in 4 ms and decay in 95 ms. Slow load drift moves friction colour and gain.

Variation

named random streams vary contact strength, tuning by 3 percent and narrow stereo pan. Speed sets contact rate and motor pitch; load adds frame weight; wear adds roller chatter; belt hardness raises friction bandwidth and the metallic contact balance.

Presets

slow soft packing belt, balanced assembly line, fast hard sorting belt, worn loaded belt. Stereo width is modest; no room reverb is baked into this close machinery recording.

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