The VC ADSR is our take on the classic ADSR: now smaller, more powerful and user friendly.

The circuit is based in a dual transistor “Current Mirror” (a voltage controlled integrator) and switching logic.


  • Voltage controlled stages with manual control.
  • Gate output on each stage of the envelope.
  • Push button and Gate/Trigger input
  • Control of the response curve between each stage of the envelope (from linear to logarithmic/exponential)


  • Current needs: +12V: 55mA, -12V: 25mA
  • Width: 8 HP
  • Depth: 30mm (including power connector)
  • Aluminium, heat-treated front panel
  • Designed, kits prepared and completed modules assembled in Barcelona
  • View in Modular Grid

Phase Time Limits:

Attack:  Min 3.0ms (down to 200µS with negative CV) // Max 10s

Decay:  Min 2.8ms (down to 400µS with negative CV) // Max 10s

Release:  Min 2.8ms (with Sustain at maximum) // Max 10s