Module A-135 is a quad voltage controlled mixer. 

It is made of four 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.

technical details

Width: 22HP 

Connections: 
4x Signal input (audio) 
4x CV input 
4x Signal output (audio) 
Sum output