velocity-invert

velocity-invert mirrors velocities around a pivot: loud becomes soft, soft becomes loud.

The integral serialists treated loudness as a parameter to invert and permute as freely as pitch; this is that operation applied to your own touch, live. Each note-on comes out at 2 * pivot - velocity, clamped into 1..=127: the pivot is the fixed point, everything else reflects through it. What you hammer arrives whispered, and the grace note you barely brushed detonates. Played for a while, it retrains the hand in a strange way: to be heard you must hold back, and emphasis becomes a thing you do by restraint.

Only note-on velocities are touched; note-offs and everything else pass untouched.

Parameters

Parameter	Type	Default	Range
pivot	velocity	64	1..=127

Example

miditool.kdl

input "Roland"
output virtual="miditool Out"

velocity-invert pivot=64      // 100 comes out as 28, 28 as 100

Try this

Turn decay into a swell. An echo makes each repeat softer; inverting after it makes each repeat louder, so every note is chased by a rising crescendo of itself, like a tape run backwards:

echo repeats=5 beats=0.5 decay=0.7
velocity-invert pivot=64

Then move the mirror: pivot=96 reflects everything into the loud half, where the gentlest touch slams out at full force and even your hardest playing never drops below a mezzo-forte.