The Hampshire Electronics ADSR-ERER is a fully analogue, performance-oriented ADSR envelope generator designed to give you exceptional control over shaping your modulation. With voltage control over Attack, Decay, Sustain and Release, plus three additional outputs (each with inverted and non-inverted signals) for envelope shaping and self-patching, the ADSR-ERER goes far beyond a traditional ADSR.

At its core, this module produces precise, musical envelopes ideal for driving VCAs, filters, timbral sculpting, modulation routing, and experimental patching. The ADSR-ERER excels at both snappy, percussive attacks and long, evolving envelopes, with its behaviour further shaped through patch-programmable feedback using the + and – outputs. Feeding these auxiliary outputs back into the individual A, D, S, and R CV inputs allows you to customise curvature, generate exponential or logarithmic-like shapes, or even push the envelope into complex, animated forms.

Manual Gate and Trigger buttons provide hands-on control for testing shapes or performing live modulation. The module features three level-controlled “OUT 1 / OUT 2 / OUT 3” outputs as well as a Main Output, giving you flexible routing options for layered or parallel modulation paths.

Despite its powerful feature set, the ADSR-ERER remains intuitive, musical, and highly playable—perfect for shaping everything from plucky VCA contours to sweeping filter movements and unconventional modulation textures.

ADSR Envelope Manual: Download ADSR Envelope Manual PDF

Specifications

General

• Format: Eurorack
• Width: 14HP
• Depth: 20 mm (thin, skiff-friendly profile)
• Circuitry: 100% analogue
• Power Consumption:
  • +12 V: 43 mA
  • –12 V: 43 mA
• Faceplate: Durable composite or aluminium
• Performance-optimised layout for fast, intuitive control

Envelope Features

• Classic ADSR envelope with Attack, Decay, Sustain, Release controls
• Fast, snappy attack suitable for percussion
• Very long A/D/R times when combined with feedback shaping
• Smooth, musical curves with controllable character

Inputs

• Gate CV Input (with manual Gate button)
• Trigger CV Input (with manual Trigger button)
• CV inputs for Attack, Decay, Sustain, Release (full voltage control)

Outputs

• Main Envelope Output
• Three auxiliary outputs, each providing:
  • Positive (+) output
  • Negative (–) output
• Outputs can be used for:
  • Envelope shaping
  • Secondary modulations
  • Self-patching edits to A/D/R curve behaviour
  • Parallel or layered modulation routing

Shaping & Self-Patching

• Inverted / non-inverted outputs allow creation of custom envelope curves
• Feed + or – outputs into A/D/S/R CV inputs to create:
  • Exponential-like curves
  • Logarithmic-like curves
  • Over-shaped or under-shaped modulation
  • Complex dynamic envelopes
• Capable of extremely expressive, animated, or unconventional modulation shapes