Control Panel Input

How it's made

Source

a fingertip on a capacitive futuristic key. Contact is a sub-2 ms high-passed noise tick; the electronics answer with a short rising chirp (about 1.4 kHz to 3 kHz in 30 ms) as a confirmation blip.

Body

a thin glass-like cover plate rings in three inharmonic modes (ratio 1 : 2.7 : 4.9, 4-20 kHz range scaled by pitch) that decay 60 dB in 80-200 ms and give the tone its glassy shimmer; a soft 300 Hz housing thump adds weight.

Envelope

tick attack 0.2 ms; chirp 2 ms attack and 90 ms exponential fall; glass modes ring out inside a 0.2 s total envelope that fades smoothly to zero, so there is no click at the end.

Spectral movement

the chirp glides upward while the glass partials stay fixed, so the spectrogram shows a rising line over a few static ringing lines.

Variation

`rng` mistunes the chirp and the plate modes by up to 3 percent; macros set pitch, glassiness (ring time and upper-mode level), chirp sweep amount and click level.

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