stutter

stutter ratchets each note into a burst of rapid hits.

Your note passes as played, and repeats re-attacks follow it in quick succession: one press, repeats + 1 hits. The first gap lasts first, and each following gap is scaled by curve: above 1 the burst decelerates, like a ball settling; below 1 it accelerates into a buzz; at exactly 1 it is a strict ratchet. On a percussive DAW instrument this is drum-machine ratcheting from a piano keyboard; on sustained sounds it turns lines into tremolo figures.

Parameters

Exactly one of first= or beats= must be given; see Time and tempo.

Parameter	Type	Default	Range
repeats	integer	6	1..=24
first	duration string	required (or beats)	positive, "250ms" or "1.5s" form
beats	number	required (or first)	finite, greater than 0
curve	number	1.0	0.25..=4.0

Example

miditool.kdl

input "Roland"
output virtual="miditool Out"
tempo 100

stutter repeats=6 beats=0.25           // seven hits, a sixteenth apart
velocity-dice seed=3 sigma=8.0         // roughen the ratchet's surface

The dice keep the burst from sounding machine-flat: each hit lands a shade harder or softer than the last.

Try this

The bouncing-ball: hits start fast and spread out as they settle.

stutter repeats=10 first="25ms" curve=1.5

Then invert it (first="120ms" curve=0.5) so every note gathers itself into a buzz, and put a velocity-curve after it to keep the bursts from shouting.