echo

echo gives each note fading repeats, like a delay pedal for notes rather than audio.

Each repeat arrives one time later and decay times softer, so a struck chord trails away in steps. Because these are notes, not audio, every repeat retriggers the instrument in the DAW, and each repeat can be transposed: set transpose and the echo becomes a canon cascade, every note chased by copies of itself climbing or sinking by a fixed interval as they fade.

Parameters

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

Parameter	Type	Default	Range
repeats	integer	3	1..=16
time	duration string	required (or beats)	positive, "250ms" or "1.5s" form
beats	number	required (or time)	finite, greater than 0
decay	number	0.6	greater than 0, at most 1
transpose	integer	0	-24..=24 semitones

decay=1 repeats at constant volume. Repeats that would transpose past the MIDI range are dropped.

Example

miditool.kdl

input "Roland"
output virtual="miditool Out"
tempo 96

// The dotted-eighth trick: repeats land off the beat and lock back
// in every third note, rhythm you did not play.
echo repeats=4 beats=0.75 decay=0.65

Try this

The canon cascade. Every note is chased up in fourths as it fades:

tempo 84

echo repeats=5 beats=0.75 transpose=5 decay=0.75

Then flip it: transpose=-12 decay=0.85 sinks each note through the octaves below, almost a piano’s sustain pedal made of notes.