Alarmsone-shot · 4.05 s
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Railroad Crossing Bell
Bright electronic crossing-bell dings at a steady interval, with a steel-like attack and fading partials.
loop · 3.00 s · 0 downloads · 0 likes
0.00 / 3.00 sLow roadside bell
Tweak
renders in the CLI · WAVChange parameters to build an exact command. Your agent runs it with sb and gets the WAV.
$ sb get 6HP4SQV0M7@1 --preset low-roadside -o railroad-crossing-bell.wav
How it's made
- Source
- an electronic crossing bell reproducing a struck steel cup through a small weatherproof driver. Each ding has a 2 ms rounded onset and a quiet 5 ms band-limited excitation, without a switching click.
- Body
- additive damped modes at 0.5, 1, 1.49, 2.03, 2.71, 3.76 and 5.12 times a 940 Hz prime; a weak split prime 2.3 Hz higher produces beating. A 310 Hz driver mode lasts only 70 ms.
- Envelope
- prime T60 is 0.90 s, hum 1.08 s; upper modes decay in 0.16-0.61 s, so each bright attack mellows naturally. A silent 30 ms voice release prevents truncation clicks; the output is dry and centred.
- Rhythm
- six identical dings per 3 s by default, exactly 500 ms apart, with no timing jitter. Every cadence setting uses a whole number of dings per 3 s, preserving the loop's warning rhythm.
- Variation
- seeded unit tuning varies by only 0.15 percent; every ding uses the same mode frequencies. Presets cover clear electronic, compact fast, low roadside and slow long-ring crossing installations.
| Parameter | Range | Default | Unit | Controls |
|---|---|---|---|---|
| pitch | 650 – 1300 | 940 | Hz | Bell pitch |
| dings | 4 – 8 | 6 | — | Dings per three seconds |
| ring | 0.45 – 1.3 | 0.9 | s | Ring decay |
| brightness | 0 – 1 | 0.65 | — | Brightness |
| steel | 0 – 1 | 0.3 | — | Steel character |
| 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
- r12026-10-25engine 1.0.1use('6HP4SQV0M7@1')