instrument
Duck LFO (sidechain pumping)
Since OS 1.1.0, the duck LFO dips a track's volume whenever another track or the metronome plays — the pumping sound of sidechain compression — triggered by audio or by notes.
Duck is the OP-XY's sidechain: choose the track that should push this one out of the way, and the level drops every time the source plays. Note data reacts to each trigger, audio to the source's sound. Hold and release shape the dip — short for tight pumping under a kick, longer for slow, breathing swells.
Details
- TE’s guide
Duck lowers the track's own volume in response to a source, giving the pumping effect usually made with a sidechain compressor.
- TE’s changelog
The duck LFO type was added in OS 1.1.0.
- TE’s guide
Any of the 16 tracks can be the source — instrument tracks 1–8 or auxiliary tracks 9–16 — and so can the metronome, for an even duck on every beat.
- TE’s changelog
OS 1.1.3 fixed using a MIDI track as the duck source.
- checked on a unit · 1.1.33
Duck shows its source as a track number (tr 1 and on), the last position a metronome icon, then amount, a live signal box and cards for hold and release.
- checked on a unit · 1.1.33
At full amount the duck dips the track to silence in about 6 ms. Hold keeps it down from about 50 ms at 0 to 0.4 s at the top; release brings the level back within 0.64 s at 0 down to almost at once at the top, so a higher release is faster.
- checked on a unit · 1.1.33
With a track as its source, the source card shows a MIDI plug when the track's notes trigger the duck, so even a silenced source track still ducks.
Parameters
| parameter | gesture | range | cc |
|---|---|---|---|
| source M4 | turn dark grey encoder | – | 40 |
| source type M4 | click dark grey encoder | audio / note | – |
| amount M4 | turn mid grey encoder | – | 41 |
| hold M4 | turn light grey encoder | – | 42 |
| release M4 | turn white encoder | – | 43 |