The OpticTone 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.

Due to legal reasons this module's name has changed but the circuit remains the same.


  • 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.

More information here:

ConditionBrand New (New)
Brand New items are sold by an authorized dealer or original builder and include all original packaging.learn more
  • Teia Synthesizers
  • OpticTone
  • Black Gold
  • 2020
Made In
  • Portugal

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Teia Synthesizers

Benfica, Portugal
Joined Reverb:2020

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