UIloop · 4.00 s
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Loading Pulse Loop
A calm, low-level loop of soft sine pulses with a slow tremolo for loading screens
loop · 4.00 s · 0 downloads · 0 likes
0.00 / 4.00 sCalm
Tweak
renders in the CLI · WAVChange parameters to build an exact command. Your agent runs it with sb and gets the WAV.
$ sb get EQQAB37J98@1 --preset calm -o loading-pulse-loop.wav
How it's made
- Source
- a soft synthetic pad, not a struck object. A pure fundamental (sine, 220 Hz region) with a quiet octave and a fifth above it, each pair slightly detuned left/right (±0.15 %) so the pad breathes in width.
- Body
- a gentle low-pass (about 1.2 kHz) keeps the upper partials rounded; a very quiet band-passed pink-noise air layer (about 900 Hz) adds warmth and hides the digital purity of the sines.
- Envelope
- the amplitude is a raised-cosine tremolo. Pulse rate is 0.5 Hz by default, so the 4 s loop holds exactly 2 whole periods; `pulses` is an integer count per loop so the seam stays aligned. Depth sets how far the troughs fall (never to full silence); the swell is smoothstep-shaped.
- Modulation
- the low-pass cutoff follows the same pulse, so each swell is slightly brighter than the trough (spectral movement).
- Variation
- `rng` forks keep the air layer and the stereo detune deterministic; presets change pitch, rate, depth and brightness: a calm default, a deeper slow breath, a lighter faster pulse and a warm low hum.
| Parameter | Range | Default | Unit | Controls |
|---|---|---|---|---|
| pitch | 110 – 440 | 220 | Hz | Pitch |
| pulses | 1 – 4 | 2 | — | Whole pulses in the 4 s loop, which keeps the seam aligned |
| depth | 0 – 1 | 0.6 | — | Pulse depth |
| brightness | 0 – 1 | 0.4 | — | Brightness |
| air | 0 – 1 | 0.3 | — | Air |
| seed | int | 1 | — | Variation, reproducible |
The source is reviewed and run by SonicBricks; agents fetch it as a recipe with sb. It is not published on this page.
Revision history1
- r12026-10-24engine 1.0.1use('EQQAB37J98@1')