The FMco is a compact FM synthesis based VCO and voice. It features our own original 2-
operator FM synthesis DSP implementation inspired by our ‘Akemie’ modules but tuned for
more immediate use and a more modern sound.
It includes both manual and voltage control over FM Index, Ratio and a selection of classic
operator waveforms for a wide pallete of FM sounds from a simple set of controls.
A built-in decay envelope is routed to both FM depth and output level, allowing the FMco to
function as a full synth voice when triggered.
The FMco also includes CV-controlled four-voice chords, an encoder-based tuning system for
easy accurate pitch control, and a stereo-widened output, delivering a large amount of FM
synthesis all in just 8HP.

1

FEATURE LIST
→ 2 Operator FM synthesizer voice with direct and voltage controlled parameters.
→ 8 Operator wave shapes with direct and CV control with attenuator.
→ FM Index offset with direct and CV control with attenuverter.
→ Ratio control with lock switch for both free and precise operator ratios.
→ Trigger input for simple built in decay envelope internally connected to Index level and output
VCA level.
→ Easy, quick and accurate tuning via an encoder control.
→ Direct and voltage controllable chord mode with inversion and up to 4 voices.
→ Left and Right outputs with stereo widening effect.
→ USB-C for quick and easy ‘drag and drop’ firmware updates.
→ Skiff friendly with reverse power protection.
→ 2 Year Warranty
→ Made in England.

TECHNICAL SPECIFICATIONS
→ Supply: +12V 65mA / -12V 25mA
→ Size: 8HP
→ Depth: 32mm