ALM Busy Circuits FMco Compact FM Synth Voice
A compact Eurorack FM synthesis voice module featuring a streamlined 2-operator architecture designed for immediate, hands-on sound design. The FMco combines classic FM principles with modern control, offering a wide range of tones from percussive hits and metallic textures to chords and evolving timbresall within a space-efficient format.
Built for both standalone use and integration into larger systems, the FMco includes a built-in decay envelope routed to FM depth and output level, allowing it to function as a complete synth voice when triggered. Its intuitive interface provides direct access to key FM parameters, while CV control enables dynamic modulation and expressive patching.
Key Features
- 2-Operator FM Engine: Direct and CV control over FM Index, Ratio, and operator waveforms
- Integrated Envelope & VCA: Built-in decay envelope for plug-and-play synth voice operation
- Chord Mode: CV-controllable chords with inversion and up to 4 voices
- Waveform Selection: 8 operator wave shapes with manual and voltage control
- Stereo Output: Dual outputs with stereo widening effect
Whats Included
- FMco Eurorack module
- Power ribbon cable
The FMco delivers a focused and playable FM synthesis experience in a compact format. With its built-in envelope, chord capabilities, and stereo output, it functions as both a versatile sound source and a complete voice module, making it ideal for adding modern FM textures to any Eurorack system.








