UIloop · 4.00 s
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Power Down
A soft descending tone with a closing low-pass and a fading hum, for shutting down or going to sleep
one-shot · 0.79 s · 0 downloads · 0 likes
0.00 / 0.79 sShutdown
Tweak
renders in the CLI · WAVChange parameters to build an exact command. Your agent runs it with sb and gets the WAV.
$ sb get DC468QSVE4@1 --preset shutdown -o power-down.wav
How it's made
- Source
- a small device losing power. A synth voice (saw + sine sub) whose pitch glides down exponentially as the supply voltage collapses, over a faint mains-style hum (110 Hz + harmonics) from the transformer.
- Body
- a low-pass filter closes from about 5 kHz to 180 Hz with the pitch, so harmonics vanish first and the tone ends as a rounded sine; the hum is band-limited below 600 Hz and sags with the same envelope.
- Envelope
- 8 ms onset ramp (no click), the tone sustains briefly, then fades over the glide (0.3-0.8 s); the hum outlasts the tone by about 80 ms before a smooth cosine-like tail brings everything to silence.
- Variation
- `rng` detunes the start pitch by up to 1.5 % and adds a faint pink air-noise floor filtered with the tone; `glide` sets the drop in octaves, `closing` how far the filter shuts, `hum` the level of the fading hum, `length` the overall duration.
| Parameter | Range | Default | Unit | Controls |
|---|---|---|---|---|
| start | 240 – 1000 | 520 | Hz | Start pitch |
| glide | 1 – 3.2 | 2.2 | oct | Glide |
| length | 0.5 – 1.2 | 0.8 | s | Length |
| closing | 0 – 1 | 0.7 | — | Filter closing |
| hum | 0 – 1 | 0.4 | — | Hum |
| warmth | 0 – 1 | 0.5 | — | Warmth |
| 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('DC468QSVE4@1')