The Retrovirus is a dual ADSR envelope for Eurorack with CV control.

There are a number of useful features.

• Every stages has a dedicated Control Voltage input and attenuator.
• The attenuator acts as an extra performance control to enable you to deviate from an intial value.
• Gate input one is buffered to input two when no cable is inserted to input two. This saves time and cables when patching synth voices.
• Each Envelope has both 10v and 5v outputs

This Envelope is based on the AS3310