Change parameters to build an exact command. Your agent runs it with sb and gets the WAV.
Command
$ sb get 92QRD70727@1 --preset soft-graphite -o pencil-writing.wav
How it's made
Source
graphite sliding across paper fibres; independent band-limited noise layers model friction at 0.7-5 kHz and fine grain at 3-9 kHz, with a steep upper rolloff rather than ultrasonic fizz.
Body
quiet, broad 650-1250 Hz paper and pencil coupling follows contact; no ringing pitched modes.
Envelope
strokes last 45-650 ms, with 6-14 ms contact ramps, pressure dips at direction changes, and 10-25 ms releases. Groups of 3-9 strokes alternate with 100-380 ms word and hand pauses.
Modulation
random 25-150 Hz friction fluctuations imitate fibre-scale stick-slip; stroke velocity changes the upper cutoff and pressure contour together. All layers stop when the pencil lifts.
Variation
seeded timing, pressure, grain and spectral tilt vary each stroke. Pace sets hand speed, stroke length sets gesture size, hardness sets fine scratch, and tooth sets paper roughness.
Presets
small neat letters, hurried short notes, dark soft graphite, and long side-lead shading.
Space
dry, close and centred; no room tone, reverb, pencil taps or page-turn sounds are added.
Parameters
Parameter
Range
Default
Unit
Controls
pace
0.65 – 1.65
1
—
Writing pace
stroke
0.065 – 0.42
0.14
s
Stroke length
hardness
0 – 1
0.65
—
Lead hardness
tooth
0 – 1
0.45
—
Paper tooth
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.