Black VCO Expander

Waveform mixer and suboscillator for the Black VCO

Erica Synths · 10 HP · 3U

Panel · 50.8 × 128.5 mm

Description

The expander of Erica Synths' Black VCO, retired, connected to it by a ribbon cable (it does not work on its own): an advanced waveform mixer and a two octaves down suboscillator.

Key features

  • SINE/TRI LVL, SAW LVL and PULSE LVL, each from inverted (counter-clockwise) to direct (clockwise)
  • The SINE / TRI switch: sine, the "tits" waveform of some FM synths in the middle, or triangle
  • A transistor -2 octave suboscillator: SUB MIX fades between -1 and -2 octaves, SUB COLOUR its lowpass filter, SUB LVL its level in the mix
  • -2 OCT OUT, SUBMIX OUT and OUT, the master mix, with a diode limiter
  • Powered with the Black VCO: +55 mA, -40 mA for both, +40 mA, -36 mA for the VCO alone

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