Voltage Controlled Mixer

Module A-135 is a quad voltage controlled mixer. It is made of 4 independent linear VCA's. The VCA outputs are mixed to a common output. For each VCA the following inputs and controls are available: audio input with attenuator, control voltage input with attenuator, gain (pre-amplification). The VCA's are realized with high-quality CEM VCA's (CEM3381).

Applications: voltage controlled mixing of up to 4 audio signals with separate control voltages (e.g. delivered by LFO's, ADSR's, Random, Shepard generator, MIDI-to-CV interface or other control voltage sources). In connection with the Morphing-Controller A-144 the soft fade-over of 4 audio signals with only one control voltage is possible.

Inputs: audio in (4x), CV in (4x)

Output: audio out

Controls: Audio In attenuator (4x), CV attenuator (4x), gain (4x)

For more detailed information please look at the English user's guide: http://www.doepfer.de/a100man/A135man.pdf

Remark: The A-135 is able to process only audio signals. It cannot be used to process slowly varying control voltages. These VCAs are able to process even slowly varying control voltages: A-130/A-131 (only the new versions with CA3080, not the old versions with CEM3381/CEM3382), A-132


  • 30 mA +12V
  • ? mA -12V
  • 0 mA 5V
  • 55 mm deep
  • Ø 3.75 (4 Votes) Average Rating

This Module is discontinued.

$175 Price in €
22 HP MixerQuadVCA
submitted Oct 6th 2012, 13:36 by demonam | last Change Sep 29th 2016, 01:58 by acgenerator