Expert Sleepers Aloysius Trapezoid Generator Module


Amelia is an envelope/function generator with an unusual AHDW configuration (attack/hold/decay/wait)

Functions: Envelope Generator , Function Generator , LFO
Height: 3U
Width: 8hp
Out of stock
Availability: In Stock | Free UK Shipping

Aloysius is an envelope with an unusual AHDW (attack/hold/decay/wait) configuration, sometimes referred to as a trapezoid generator.

CV control of all envelope times is provided. The envelope can be set to auto-trigger, turning it into a complex voltage-controlled LFO.

The shape of the attack and decay sections can be independently and continuously adjusted from exponential, through linear, to logarithmic.

The module is constructed entirely from analogue parts and discrete logic. There is no microcontroller or digital-to-analogue conversion involved and therefore no quantization of voltage levels or of the response time.

Explore the Expert Sleepers analogue modules:

Panel width: 8HP

Module depth: 42mm

Current draw: 33mA on the +12V rail, 33mA on the -12V rail


  • Gate input
  • CV inputs for attack, decay, breakpoint, and release


  • Envelope output

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Expert Sleepers Aloysius Trapezoid Generator Module