M²Synth MU Format ADSR 120 Kit

(£118.80 UK, incl VAT)
390 g
1-2 Weeks
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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. 


  • 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).


  • Supply voltage +/-15Vdc using the included inline voltage regulator
  • Supply current  +20mA / -23mA
  • Output level 0-10V
  • Typical delay times
Short Time Mode
  Min 50% Max
Attack 3mS 12mS 1S
Decay 6mS 35mS 3S
Release 7mS 40mS 3S
ADSR 16mS 90mS 7S
Long Time Mode
  Min 50% Max
Attack 30mS 120mS 12S
Decay 60mS 350mS 25S
Release 70mS 400mS 30S
ADSR 160mS 900mS 57S


  • 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 PCB holder)
  • Fixings
  • Fully assembled and boxed 15V in-line voltage regulator with MU and MOTM headers