Countdown Beeps

Three short evenly spaced sine beeps followed by a longer final beep an octave higher

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Preset

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Free for commercial use. No attribution needed.

Tweak

renders in the CLI · WAV

Change parameters to build an exact command. Your agent runs it with sb and gets the WAV.

Command

$ sb get WM9APEDNPA@1 -o countdown-beeps.wav

Source: an electronic beeper driven by a gated sine oscillator, as in a timer or a launch countdown. Each beep is the gate opening and closing, not a struck object, so the sound is a steady tone.
Body: a pure fundamental (e.g. 880 Hz) with an optional faint 2nd and 3rd harmonic (-26 to -14 dB) that mimics a small piezo or speaker cone; the final beep is the same timbre one octave up (2:1).
Envelope: a 6 ms raised attack and a 25 ms release remove gate clicks; the three countdown beeps hold 0.2 s, the final beep holds 0.9 s and decays gently over its last 0.25 s like a speaker settling.
Timing: the beeps fall on an even grid (1 s by default), the final one on the next grid point; `rng` detunes each beep by a fraction of a percent and varies its level by about 0.5 dB so it is not rigid.
Variation: `pitch` sets the register, `interval` the tempo, `warmth` the harmonic content; presets move from a soft chime-like count to a fast, bright start signal.

Parameters
Parameter	Range	Default	Unit	Controls
pitch	440 – 1320	880	Hz	Pitch
interval	0.4 – 1.2	1	s	Interval
beepLength	0.08 – 0.4	0.2	s	Beep length
finalLength	0.4 – 1.4	0.9	s	Final length
warmth	0 – 1	0.2	—	Warmth
count	2 – 4	3	—	Countdown beeps
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.

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