Timpani Roll Crescendo

A kettledrum roll swelling from a whisper into a single powerful accent hit

one-shot · 2.12 s · 0 downloads · 0 likes

0.00 / 2.12 sMP3 preview · Short tense hit

Preset

Show spectrogram

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 ACGSYRZ07N@1 --preset tense-short -o timpani-roll-crescendo.wav

Source: a pair of felt mallets alternating on a tuned kettledrum head. Each stroke is a 3–8 ms low-passed noise burst (soft felt ≈ 1.5 kHz, hard felt ≈ 5 kHz) plus a short band-passed "tap" of the felt on the skin.
Body: the stretched membrane rings in near-harmonic modes, ≈ 0.5 : 0.75 : 1 : 1.22 : 1.45 × the nominal pitch (the 3:4:5 group gives the clear pitch, the weak 0.5 mode is the deep thump). Decays run from 0.9 s (lowest) to 0.25 s (highest); the head stretches right after the strike, so a sine at the lowest mode glides down ≈ 7 % over 70 ms.
Envelope: the roll is ≈ 14–24 strokes per second, accelerating slightly; neighbouring strokes overlap because each rings 0.4–0.6 s, which fuses them into a continuous swell. Stroke strength rises along a convex curve (pp → f); the final accent is a full-strength single stroke that rings for ≈ 1 s.
Variation: `rng` jitters every stroke's timing (±12 %), strength (±12 %), mode tuning (±0.6 %) and pan (left/right hand alternation). Presets change pitch, roll length, mallet hardness and ring.

Parameters
Parameter	Range	Default	Unit	Controls
pitch	80 – 200	120	Hz	Pitch
roll	0.9 – 2.2	1.6	s	Roll length
speed	0 – 1	0.5	—	Roll speed
start	0 – 1	0.15	—	Starting level
hardness	0 – 1	0.45	—	Mallet hardness
ring	0.6 – 1.5	1	—	Ring
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