MATRIXSYNTH: Befaco Octaves VCO Jam with Turing and Pony VCO, VCF

Saturday, March 23, 2024

Befaco Octaves VCO Jam with Turing and Pony VCO, VCF

video upload by Molten Music Technology

"I gave Befaco's new Octaves VCO a bit of a run, pairing it through the Pony VCF and playing along with the Pony VCO and friends."

See the launch party posted earlier today.

Octaves VCO via Befaco

A harsh and funky take of an additive Oscillator.

Pile up multiplications of your frequency to get a lo-fi-retro wall of squared sound!

You get six doubled frequency pulses, or octaves, with common PWM and volume control for each of them.

The output of each is cascaded to the next one, so you can either have one output with all frequencies or break the chain and get several sums and modulate each independently!


Six bands, multiple of the base frequency.

Square wave oscillator with Octaves selector PWM control and sync.

Range control for Tune pot.

Volume CV control and individual output for each band

Cascaded summing outputs.


Current needs: +12V: 110mA, -12V: 84mA

Width: 12 HP

Depth: 22mm (assembled and DIY), including power connector

Aluminium, heat-treated front panel

Designed, kits prepared and completed modules assembled in Barcelona

PONY VCF via Befaco

Space-conscious lowpass filter and volume processor.

A combination of VCF + VCA + Mixer that lets you mix three different sound sources, and shape their tone, and levels in a breeze.

The Pony Filter is built around the SSI2144 FATKEYS™ Chip. Has the elegant sound of the classic transistor filter without the associated distortions, due to Dave Rossum’s “improved ladder” topology.


3 Channel Mixer (Out normalized to channel three for feedback)

Temperature-compensated Q and frequency.

Compensated Volume VS Resonance

2 Cuttof CV INs.

CV 1 Selectable routing Cut-Off or Cut-Off+VCA

Voltage controlled Q

Two Segment Peak Meter


Four-pole, 24 dB/octave

Current needs: +12V=50mA, -12V=45mA

Width: 6 HP

Depth Assembled Version: 22mm

Depth DIY Kit Version: 35 mm

Designed, kits prepared and assembled in Barcelona.

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