GMSN! Pure ADSR Eurorack Module
GMSN! Pure ADSR Eurorack Module

GMSN! Pure ADSR Eurorack Module

Regular price £89.60

The GMSN! Pure ADSR module is used to create CV envelope, which can be patched into other eurorack modules to control pitch, filter cutoff and volume. These are either triggered externally or manually via the trigger button.

There are three envelope modes to choose from:

  • ADSR - Once triggered the envelope goes through all 4 stages: Attack, Decay, Sustain & Release
  • AR - The envelope will go straight into the Release phase as soon as Attack is completed. Great for drum synthesis
  • Trap Mode - This is a looping trapezoidal envelope with 4 stages: Attack, On, Release, Off. This can be retriggered externally or via the trigger button and can be used to create looping LFO shapes.

The design is based on the same chip used in the Arduino Uno, which means the same code, libraries and IDE can be used. Check out the GMSN! Youtube video for how to upload the code onto the module.

Ask.Audio logo

Checkout the Ask.Audio review of the Pure Modular for more info and sample audio.


Module Specifications:
Output Voltage: 0 - 10v
Width: 8HP
Depth: 22mm
Power: 30mA +12v; 4mA -12v

Open Source Documentation:
Schematic PDF
Eagle Schematic
Eagle PCB
Illustrator Panel Artwork
Panel Outlines.dxf
Bill of Materials
Mouser BoM
GMSN! Pure ADSR Arduino Sketch

Synth DIY Support and Documentation
All build docs, videos and general support chat are located on the GMSN! Synth Design Slack Site. Come and join in!

Creative Commons License

This Open Source Design is licensed under a Creative Commons Attribution 4.0 International License.