Duck Call

OP-1 filter · sidechain · gate · choke
↓ Download for OP-1

Something hits, and your sound ducks out of the way, or opens up only on the hit. Inspired by Befaco's PercAll, built for the OP-1 on hundekraft, and drawn as an early 20th-century carnival duck shoot. Press play, pick a beat, and turn the knobs.

Blue: length
Green: strength
White: shape
Red: source

Rhythm Machine

Click a step to change the beat

The beat plays on the OP-1's four tape tracks: T1 kick, T2 open hats and cymbals, T3 snares and claps, T4 closed hats and percussion. Duck Call sits on the pad (the drums stay dry), so set red to a track and the pad answers it. The red crosshair marks the track that triggers, the X marks the track that chokes.

Put it on your OP-1

  1. Your OP-1 needs hundekraft 3.2 or later.
  2. Download duckcall.knl.
  3. Open the hundekraft workshop in Chrome, go to Your plugins and choose Add your plugin files.
  4. Choose Connect my OP-1, then Review changes and Send.
  5. Press T1 on the OP-1 when it asks. Duck Call is now in the FX list of any synth, the drums or the master.

Blue length, press for attack. Green strength, press for accent or sensitivity. White shape, press for flip (duck, flat, gate). Red source, press for choke.

Everything is in the manual, with recipes and tips. Source code, older versions and the screen art are on GitHub.