Envelope follower function for analog compression

This module converts audio signal strength to CV voltage the classic analog way by firstly rectifying audio signal then blending it to continuous CV using separate attack and release stages. This signal can then be attenuated and fed to VCA to create analog compressor or expander as well as for sidechaining – lowering the gain of other signals for a cleaner mix. Quad VCA Module

Threshold CV control

Threshold inputs allow subtracting the envelope with another positive CV output, designed for selecting minimum gain to start the compression. It can be also used to achieve ducking effect for example when kick or other sound is passed to one envelope follower then its output to attenuator and from there to threshold input of to the next follower handling synth voice envelope.

The Real Sidechain Compression

However for real sidechain compression synth voice or its envelope would have to be fed to dedicated VCA and its gain controlled with the sidechaining envelope.

Attack-Release envelope generator

Module can also be used as Attack-Release envelope generator by sending gate signal to it, it outputs beautiful precision envelopes with logarithmic attack and exponential decay.

Rhythmic decay slopes

When paired with our Gate to Trigger converter it can also generate analog exponential decay slopes that sound very good when sent to voltage-controlled filter, these slopes are also useful to modulate white noise gain or different VCO and VCA parameters to create kicks, hihats and other rhythmic sounds.

• Dual VCO
• White noise generator

Led indicators

Each envelope follower in the module has its own led indicator that lights proportionally to generated envelope CV voltage.

Quality module components

Each envelope follower in the module has a discrete core of 9 carefully selected OpAmps, signal rectification, attack, release and threshold stages are based on innovative ideal diode OpAmp topologies with very low offset and high precision even when processing low voltage signals.

Plan your Eurorack synthesizer on ModularGrid

Our Dual Envelope Follower module is available on ModularGrid where  you can visually build your own Euroack synthesizer rack, also view synthesizers that other artists have built using this module. Our Env. Follower on ModularGrid