Optocore

The Optocore is a combination of a 12dB multi-mode Vactrol Filter and a Vactrol Voltage Controlled Amplifier. It is a completely original circuit inspired by the singular nature of Vactrols and their fluid and natural character.

Features:

  • Vatrol based 12dB multi-mode Voltage Controlled Filter: Lowpass, Bandpass and Highpass.
  • Vactrol Based Voltage Controlled Amplifier.
  • Crossfade between VCF and VCA section.
  • Voltage controlled Resonance.
  • Ping Input for percussive sounds generation.
  • Cutoff Frequency polarity inversion switch. Doesn’t change VCA polarity
  • Overdrive and Feedback controls.
  • Attenuator/inverter knobs on all voltage controlled inputs
  • Touch control over Frequency and Amplitude.

 

Specs:

  • Width: 10HP
  • Depth: 33mm
  • Power consumption: 55mA +12 / 55mA -12
  • Eurorack Format
  • Doepfer power connection

Price: 220€

Available here on reverb or contact us via email.

 

The Optocore is a combination of a 12dB multi-mode Vactrol Filter and a Vactrol Voltage Controlled Amplifier.
It  is a completely original circuit inspired by the singular nature of Vactrols and their fluid and natural character.
The Filter section provides the three fundamental filter types: Lowpass, Bandpass and Highpass.
A Resonance knob with voltage control input is available for improved modulation flexibility. The feedback knob interacts with the Resonance path, tempering it from creamy resonance to wacky self-oscillation.
Filter and VCA run in parallel, both are controlled by the Freq/Amp knob and it’s associated voltage-control input. The combination of both signals can be crossfaded with a dedicated knob.
The Freq/Amp is also controlled with direct touch control on the panel via the 3 lines below the knob.
The filter frequency control can be inverted by the Inv Freq switch, providing the possibility to change the filter direction. This feature allows the filter to “close” when the VCA is “opening” or the other way around.
The Ping input allows to generate the well known vactrol filter percussive sounds if a gate or trigger signal is provided. The Ping frequency if controlled by the Freq/Amp knob, ranging from low kicks drums to high pitch bongos.
There is also a Drive knob to take care of your saturation needs. The Overdrive range is wide, from soft textural clipping to heavy distortion.
All voltage controlled inputs have an attenuator-inverter knob.

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