Overview 

The ADSR 120 is one of the core modules essential to an analogue synth. Most frequently used to control a VCA but equally used to control the cut-off of a VCF. Larger systems can expect to have the need for many ADSR modules. In addition to the ADSR 120, a voltage controlled version, the VC ADSR 121 allows for dynamic changing of the ADSR values from external control sources. 

Features 

• Controls for Attack, Decay and Release envelope phases along with the Sustain level
• Time range selection switch x1 / x10
• Gate input for full ADSR output
• Manual gate button
• LED indicator of gate pulse
• AR Trig input for full AR envelope from a trigger pulse
• The AR Trig input can also be used for re-triggering the attack / decay phases whilst the gate input is active
• Gate output for cascading ADSR modules. Gate pulse width equal to the attack, decay and sustain periods (just the attack period when in AR trig mode).

Specification

• Supply voltage +/-12Vdc
• Supply current  +20mA / -23mA
• Output level 0-10V
• Typical delay times

• Main PCB dimensions 43.5x154.85mm

Kit contents

Each kit contains

• Main PCB
• Jack socket PCB
• All electronics components, IC sockets and power socket
• 100mm long Power lead 
• Potentiometers, knobs, switches and jack sockets
• Front panel assembly (faceplate and 3mm aluminium back panel)
• Fixings