Open instruments for VCV Rack

Kurkesmurfer

Original digital instruments shaped by unusual hardware, careful reconstruction, and hands-on musical use.

The first collection

SpaceTime

A modular, multi-playhead arbitrary function generator inspired by the Buchla 248 MARF. Program one field of stages, then move up to eight independent heads through it.

4–64Stages
1–8Playheads
4Clock modes

Release preparation

  • VerifiedVCV Rack build and host test suite on Apple Silicon
  • BuiltmacOS arm64/x64, Windows x64, and Linux x64 packages
  • TestingRelease-candidate builds; Intel macOS, Windows, and Linux acceptance pending
  • PlannedFused 16-stage, two-head MetaModule edition

Working principles

Specific instruments, transparent lineage.

Kurkesmurfer projects credit their inspirations, separate original work from reference material, and publish source, manuals, limitations, and test status together.