Doepfer A-135-2 Quad VCA/VC Mixer audio-technica The tight supercardioid pattern

The tight supercardioid pattern

When the output of the comparatur is added to the input signal (a sawtooth in the example) with the correct level relation between both signals one obtains a phase shifted sawtooth

clocked audio delays or switched-capacitor filter

Add optional external speed control and a ratio knob that determines the rhythmic subdivisions - or as we like to say

the control units of VCA2 and VCA4 are out of operation

Doepfer A-135-2 Quad VCA/VC Mixer audio-technica The tight supercardioid patternA 135 2 is a miniature version of the A 135 1. Behind a front panel with 8 HP only four linear VCAs (voltage controlled amplifiers) and a voltage controlled mixer based on the VCAs are available. Controls, In Outputs and Functions of each VCA: Level (manual control of the VCA amplification), small rubberized knob (L1 L4) Control voltage input with associated attenuator (CV1 CV4), for the full VCA control range about 0+5V control voltage are required