Build a powerful analog voice with depth, width, and character using this curated Eurorack bundle featuring the 3340 VCO Complete Kit and the Riot ST VCF Complete Kit.
This combination gives you the essential foundation of subtractive synthesis — a stable, classic 3340-based voltage-controlled oscillator paired with a warm, rich stereo analog low-pass filter.
While the 3340 VCO provides a solid and musical sound source, the Riot ST VCF expands it into the stereo field, offering expressive control over Frequency, Resonance, and Stereo Space. With its dedicated Stereo Space fader and CV input, you can create wide, animated filter movement from a single mono oscillator — turning simple waveforms into spacious, dynamic textures.
What’s Included
3340 VCO Complete DIY Kit
Riot ST VCF Complete DIY Kit
All required electronic components for both modules
Factory pre-soldered SMD sections (no SMD soldering required)
Detailed build documentation
Why Choose This Bundle?
Complete analog voice foundation (Oscillator + Stereo Filter)
Expressive stereo movement and modulation capabilities
Easy-build format with pre-soldered SMD components
Ideal starting point for a powerful Eurorack voice
Better value compared to purchasing both kits separately
Both kits are designed to streamline the build process. All essential SMD components are professionally assembled at the factory, leaving only through-hole (THT) components for installation — delivering a satisfying DIY experience without the complexity of SMD soldering.
The Riot ST VCF can process mono signals in stereo thanks to its internally linked inputs, allowing you to generate wide spatial movement from a single oscillator. Add a VCA, envelope generator, and power solution to complete a fully playable analog voice.
