Key data

Quad VCAr

Parameter Value
Width 10HP
Depth 25mm
+12V current 50mA
-12V current 50mA
Lifetime 10/20 to 12/22
Modulargrid Link

Original printed manual

PDF download

Features

The cornerstones of modular patches

VCAs are absolutely essential in a modular system, for example for:

  • Shaping the amplitude or timbre of a tone with an envelope.
  • Animating a mixture of several oscillators.
  • Controlling the amount of filter modulation with a random source or a touch controller.
  • Applying an envelope on the linear FM signal hitting an oscillator.

An updated classic

  • More compact footprint (10-HP), with sliders instead of knobs for the main gain/CV control.
  • Gain indicator LED.
  • Positive offset control (0 to 8V) for direct use of bipolar modulation sources.

Specifications

  • All inputs DC-coupled.
  • All inputs handle audio-rate signals.
  • Input impedance: 100k for all inputs.
  • Gain scale: a +5V CV translates to a gain of 1 (0dB), both in linear and in exponential mode.
  • Large gains above +20dB (sufficient for amplifying line-level signals) achievable in exponential mode.
  • Offset control adding an adjustable voltage from 0 to 8V to the gain CV.