hundekraft instruments / experimentsORIGINAL OP–1 · R246
hundekraft 2.1 / ORIGINAL OP–1

Your OP–1. A little more yours.

New sounds, useful additions and handcrafted presets. Choose what you want and build your firmware.

112 handcrafted presets, matched to your build ↓
00 / THE FOUNDATIONALWAYS INCLUDED

op1r 27

Stock R246, plus op1r’s synths, effects, sequencers, quad LFO and MIDI controls. Plus 48 presets from our sound collection.

What’s in the base bundle? Explore 4 screen previews
Iter lab screen
Iter labAn animated lab screen for the stock Iter synth.
Quad LFO screen
Quad LFOFour modulation sources, including modulation of other LFOs.
Euclid screen
EuclidSix-slot Euclidean sequencing.
Dots step sequencer screen captured in the emulator
DotsSix-slot sequencing with live recording, FX parameter locks and lock-only triggers.

The added effects also work as master FX. Also included: 4/8/16-beat count-in, accented metronome, Oblique Strategies cards (Shift + help), tape markers, six-channel USB output, resource monitor, MIDI CC/sync and OP-Z controller mode. Granular needs a sample loaded or recorded into its slot.

Read the op1r notes ↗
OP1R SYNTHS + EFFECTS
MAIKO / THE TOOLKITOPTIONAL · INCLUDED BY DEFAULT

Tape undo/redo, snapshot naming, scale mode and storage information. All Maiko additions from #247–249.

What’s in Maiko’s toolkit? Explore four features

A little more freedom to play, save and try again. Features from Maiko Pruett’s #249 ↗, combined with op1r 27.

FILE storage overview
FILE

See how your storage is used, with space for tape, sounds, system files and what’s left free.

SHIFT + COM · BLUE ENCODER → FILE
Scale mode set to C major
Scale mode

Choose a key and scale to filter the notes you play. Switch it off to return to the full keyboard.

SYNTH → T2 · HOLD SHIFT
Character picker for naming a saved preset
Name your presets

Name synth and drum snapshots on the tape-reel save screen. Up to 12 characters, with backspace and automatic handling of duplicate names.

HOLD A PRESET KEY / 1–8
Tape UNDO popup
Tape undo / redo

Step back through up to seven recordings, then forward again. Includes punch-ins, overdubs, loops and lift/drop/slide/split/join, stopped or playing. History survives an ordinary restart.

HOLD TAPE + ← UNDO · → REDO
Read the Maiko release notes ↗
01 / SYNTH ENGINES
02 / EFFECTS
THE HUNDEKRAFT SOUND COLLECTIONMADE FOR THESE ENGINES
112

Sounds to
start something. Wanna be startin’ somethin’.

From bell keys and drawbar organs to soft pads, frozen textures and slow-moving drones. We’ve made a collection for op1r and our own engines—your pack includes only the sounds your build can play.

Lab Flute · Warm Ensemble · Frozen Toffee · Midnight Mass · Aurora

Download matching preset pack ↓Separate download. Install through disk mode after updating the firmware. The preset limit includes sounds already on your instrument. Granular presets need a sample loaded or recorded into the slot.
03 / ROOM TO EXPLORE
04 / BACK TO MAKING MUSIC

Download your firmware, then install it using the OP–1’s usual firmware-update mode. This workshop is for the original OP–1, not the OP–1 field. Preset files are installed separately through disk mode.

05 / CHANGELOG

2.5

  • Base updated to op1r 27. Our synths and effects are now built into op1r’s own engine system.
  • Pick which of op1r’s synths and effects to include: Supersaw, FM Bell, Granular, Tape, Clouds and Reverb.
  • New screens for Wavetable, Taffy, PEW, Elg, Washer and Snowglobe.
  • Quad LFO no longer crackles next to heavy effects like Reverb and Snowglobe.
  • Washer’s white knob now shortens the delay smoothly across its whole range. Before, the upper half jumped.

2.1

  • Fixes crashes in Dots (press REC, then add a note) and Euclid (hold Shift and press note keys). The OP–1 keeps settings, sounds and sequences in an SQLite database with a fixed amount of working memory. With a lot of saved sounds and sequences, that memory could fill up and the firmware stopped on an error screen. 2.1 limits how much of the database is kept in memory.
  • Knobs on Wavetable, Taffy, PEW and Elg are smoother. Turning one while notes play no longer clicks or steps.

2.0

  • Base updated to op1r 22.
  • Adds Maiko’s #249 toolkit (tape undo/redo, snapshot naming, scale mode, storage overview), optional and on by default.

1.0

  • First release, on op1r 18.
  • Hundekraft synths (Wavetable, Taffy, PEW, Elg) and effects (Washer, Snowglobe), plus a choice of 100 or 300 user presets.
  • A matching collection of up to 112 presets.