SignalFunctionSet
Plugins for VCV Rack and the Critter & Guitari EYESY, desktop software for samplers and synths, and workshops on synthesis and sound design.
VCV Rack
Free, open-source modules for VCV Rack. Most also run on the 4ms MetaModule.
Arrange
A song-form sequencer for VCV Rack. Eight phrases hold your song's sections (bar length, key, tempo) and four per-instrument clock buses drop each instrument in and out as the arrangement moves.
Beat
A single-voice drum sequencer for VCV Rack. One Beat is one drum: eight patterns of sixteen steps, each step with velocity, accent, and probability, all edited on-screen.
Chance
A generative melodic sequencer for VCV Rack. You don't program notes: you set a key and a few probabilities, and Chance walks a line through the scale. Every decision is seeded, so a pattern is a fixed, repeatable melody rather than noise.
Meter X
An expander for Meter. A 24 PPQN clock, a run gate, and bar-multiple triggers out to 128 bars, each with a pie chart showing how far through its cycle you are: structure that unfolds over minutes, not beats.
Meter
A time-signature-aware master clock for VCV Rack. Six musical subdivisions with per-output swing, swung and grid jacks side by side, CV over the time signature, and external clock sync.
EYESY
Visual modes for the Critter & Guitari EYESY video synthesizer.
Image Trip
An EYESY video synth mode that transforms static images into flowing kaleidoscopic animations by stretching and repeating rows and columns of pixels.
String Vibrations
An EYESY video synth mode that renders incoming audio as a scrolling 3D field of vibrating strings. Each string shows the waveform at a different moment in time.
Cubicles
An EYESY video synth mode: a 3D wireframe cube matrix with depth-of-field effects that pulses with brightness and color highlights in response to audio.
Tempestuous
An EYESY video synth mode inspired by classic vector arcade games: fly through a 3D tunnel that warps and pulses in response to incoming audio.
Software
Desktop tools that make working with samplers and synths less painful.
SampleStack
A desktop sample manager for Eurorack and hardware samplers. Organize, browse, convert formats, and transfer sample libraries without the painful CLI workflow.
Eyesy Simulator
A native macOS and Windows simulator for the Critter & Guitari EYESY video synthesizer. Develop, test, and preview video synth modes without the hardware.
Workshops
Slide decks and materials from workshops on synthesis and sound design.
Intro to Synthesis
An interactive slide deck covering the fundamentals of subtractive synthesis: oscillators, filters, envelopes, LFOs, and the classic voice architecture.
Granular Synthesis Workshop
Workshop materials on granular synthesis: interactive timeline, curated mixtape, and historical notes from Fourier to Mutable Instruments. Run at Synth Library Portland.
Writing
Notes and essays on synth tool design, workflow, and the practice of building instruments.
Nightly builds on GitHub
SignalFunctionSet now publishes nightly VCV Rack plugin builds on GitHub, rebuilt on every commit, for macOS, Windows, and Linux. Includes work-in-progress modules ahead of the VCV Library release.
What's new in 2.16
Release notes for SignalFunctionSet 2.16: six new modules including Arrange, Chance, Meter X, Cycle, Record, and Play, plus a shared-scale migration for Fugue.
What's new in 2.15
Release notes for SignalFunctionSet 2.15: two new DX7 modules, Operator and OP ENV, plus a gate-length overhaul across the sequencers.
Eight months building modules with Claude
Notes from eight months of building VCV Rack, MetaModule, and Disting NT modules with AI assistance.
Cheat Sheets
Quick references for the gear and platforms our modules run on.