Amp
Stepped preamplification, differential input, AC coupling, and voltage-controlled gain.
VCV Rack 2 instrument family
Homodyne
A lock-in amplifier taken apart and made patchable.
Architecture
Six views into one unusual signal path.
Homodyne turns the functional blocks of a musical lock-in amplifier into separate VCV modules. Place the family together and its VCV expander interface supplies the normalled signal path; patching a destination jack overrides that normal. Every block remains available for unrelated patches.
Amp→Bandf→Hilbert+Quadosc→Demod→Polar
Preview status
Ready for platform testing.
The current VCV baseline is accepted on Apple Silicon. Matching Intel macOS, Windows x64, and Linux x64 packages have been cross-built and published to the private test node for acceptance on their native machines.
- LicenseGPL-3.0-or-later
- VCVFour architecture packages built with Rack SDK 2.6.6
- MetaModulePreview package built and symbol-validated; hardware testing pending
- PanelsKurkesmurfer light and dark themes
- AcceptedApple Silicon VCV functional test
- TestingIntel macOS, Windows, and Linux acceptance pending
Module family
Patch the whole instrument or borrow a block.
Bandf
A pingable variable-bandwidth filter with centre, width, and resonance control.
Quadosc
A through-zero quadrature oscillator with sine/cosine outputs and pitch tracking.
Demod
Quadrature multiplication, time-constant filtering, and sum/difference outputs.
Hilbert
A wideband phase-splitting network with in-phase and quadrature outputs.
Polar
Converts I/Q signals into magnitude and phase control voltages.
Lineage
An independent digital interpretation.
The project is inspired by the signal architecture and musical possibilities of the Joranalogue Audio Design × Hainbach Collide 4 and by historical lock-in amplifiers. Its software, DSP implementation, panel system, and separation into six modules are independent Kurkesmurfer work. It is not affiliated with or endorsed by Joranalogue Audio Design or Hainbach.
This is a digital VCV instrument, not an electrical model of the analogue hardware. Expect its own gain structure, nonlinearities, limits, and sound.