Gatekeeper is a versatile volume modulation effect with eight envelopes, curve drawing tools, MIDI triggering, and CV output, capable of gating, sequencing, and creative automation.

Core Function
Gatekeeper is a volume modulation effect designed to create precise, punchy gates and rhythmic patterns. It supports sample-fast transitions and includes a variable smoothing algorithm to eliminate clicks and pops, ensuring clean output even with aggressive settings. The effect can act as an LFO, envelope, step sequencer, or sample-accurate automation tool, making it a flexible addition to any audio chain.
For creative use, the built-in boost and clip features add extra punch to the signal. The tempo-mapped looping allows patterns to sync with your project, and the CV output enables connection to modular synthesizers for external hardware modulation. With hundreds of presets, you can quickly find starting points for production, mixing, or sound design.
Key Capabilities
The interface includes curve brushes and an elaborate shortcut system for drawing automation envelopes. There are 31 kinds of envelope brushes and four copy slots, allowing for intricate pattern designs. Each of the eight independent volume envelopes can be drawn with up to 1024 nodes, enabling long sequences up to twenty hours in duration.
MIDI triggering makes it possible to control the envelopes in real time, opening up expressive performance possibilities. The panning tools add spatial movement to your sound. The combination of these features makes Gatekeeper suitable for everything from adding rhythmic tremolo to full-on gated sound design.
Workflow Integration
In a mixing context, Gatekeeper can tighten up percussion or create sidechain-style pumping effects without the need for compression. For sound design, you can use the envelope drawing tools to craft evolving textures or stutter effects. The CV output extends these capabilities to modular hardware, letting you modulate external gear in sync with your session.
The MIDI triggering allows you to play the gates like an instrument, which is ideal for live performance or creating dynamic transitions in a track. The presets serve as a jumping-off point; you can tweak them or build your own from scratch. This makes it equally useful for producers, mixers, and sound designers looking to experiment with rhythm.
Practical Applications
Use Gatekeeper on synths to create rhythmic gating patterns that evolve over time, or on drums to add punch and movement. For ambient sounds, the LFO-style modulation can generate slow, evolving volume swells. In electronic music, it excels at creating build-ups and breakdowns, while the boost and clip features can add grit to a clean signal.
The long sequence capability is ideal for generative patches that run for extended periods. For modular users, the CV output adds another layer of control. Whether you’re producing a track, mixing a session, or designing sounds from scratch, Gatekeeper offers a broad range of creative possibilities.
Key features
- Eight independent volume envelopes
- Variable smoothing algorithm to avoid clicks and pops
- Sample-fast transitions for precise gating
- MIDI triggering for performance control
- Panning tools for spatial modulation
- Tempo-mapped looping for sync
- CV output for modular synth integration
Best for
Producers and sound designers seeking a flexible volume modulation tool for rhythmic gating, LFO-style effects, and sample-accurate automation in electronic music or post-production. Ideal for adding punch and movement to synths, drums, and full mixes.