Alarm Clock Beep

How it's made

Source

a clock's electronic square-wave driver excites a small piezo diaphragm at 0.9-3.2 kHz. A band-limited square supplies odd harmonics, not hard clipping or broadband switching clicks.

Body

a broad diaphragm resonance at 1.015 times the drive (Q 2.8) reinforces the fundamental; a weak plastic aperture band at 1.7 times the drive adds colour without a separate pitched note.

Envelope

4 ms attack, slight supply droop to 92 percent, 10 ms electrical release; the diaphragm then rings freely for 25 ms. Low-pass cutoff settles over 35 ms to soften sustained harmonics.

Rhythm

double beeps at 0 and 0.25 s of each second by default; the 4 s loop holds four phrases. Other patterns are steady half-second pulses or four short beeps followed by a half-second rest.

Variation

each beep has deterministic tuning tolerance of +/-0.12 percent and level +/-1 percent. Presets cover a classic double alarm, lower bedside pulses, urgent quartets and a nasal vintage clock.

Space

dry mono, with no room ambience; shaped gates and bounded resonances keep the alarm clean.

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