Plugins that
play in key.
Touch the circle to hear a small instrument. The background moves with the sound you make.
in development
in development
in development
A small browser demo made with Web Audio, not the sound of the plugins. Turn a dial by dragging up or down, or with the arrow keys. Skyrmion: closed beta, opening soon. Orbital, Holon and Spinon are in development. None is on sale yet.
Skyrmion
Key Step Filter
Draw a pattern. The filter plays a melody in your key. Every step snaps to your scale, so a plain pad, bass or loop turns into a tune.
- Each step lands on a note of the scale you pick
- Draw mode, step lanes and smooth curves
- VST3 plugin for Windows, 64-bit.
Not on sale yet.

Always in key
- 12 keys and 16 scales
- Steps, LFOs, lanes, the envelope and the delay all go through the same lock
- Detect: play your track and it suggests the key it hears
- Key wheel with a Walk that moves the key while the song plays
Sequencer and lanes
- 1 to 32 steps, synced rates with triplets and dotted, swing
- Forward, reverse, ping-pong or random
- Per step: curve, repeats, probability, skip
- Lanes with their own length, so patterns drift against each other
52 filter models
- Four originals (Ladder, Multimode, SVF, tuned Comb) and 48 circuit models
- Low-pass, band-pass, high-pass and notch where the model has them; 12 or 24 dB
- No clicks when you switch model while it plays
- A limiter keeps the loudest resonance below -0.3 dBFS
Delay and modulation
- A delay that stays in key, three ways
- Two LFOs with 37 waves, or draw your own
- Envelope follower, filter envelope, 4-slot modulation matrix
- Export the melody as a MIDI file

About AR-K AUDIO
AR-K AUDIO makes plugins that stay in key. They are built on one shared core.
AR-K AUDIO started in the studio, not in a meeting room. Making music, we kept running into the same thing: great plugins that have no idea what key your song is in, and no idea the other plugins exist. A filter that ignores the melody. A sequencer that plays the one wrong note at the best moment of the track.
So we started building our own. AR-K plugins work from a key and scale you set, so whatever they do, a filter or a melody, they stay on your notes. Under all of them sits one shared core, so they share one look and one way of working. Skyrmion is the first.
Orbit, our one-eyed alien, watches the particles to see what they do next.
Contact
Questions, ideas or bug reports? Write to info@ark-audio.com.