ASR Envelope

Maker	Kassutronics
Type	Simplified attack/sustain/release envelope with loop mode
Mounting	Through-hole
Width	4 HP
License	Proprietary (No licence published)
Difficulty	🧊 Low-count through-hole

A single Release control sets both the decay and release times, and a Loop switch turns it into a triangle LFO. Beginner-friendly single-PCB build, all through-hole, 4 HP.

Documentation

• Assembly instructions
• Bill of materials (BOM)
• Schematic
• Fabrication files (PCBA-ready)

Links

• Source / files on GitHub
• Maker page
• Buy: Kassutronics Store

More from Kassutronics

VCO 3340 Analog VCO based on the AS3340 KS-20 Filter MS-20-style multimode filter Transistor Ladder Filter Transistor ladder low-pass filter Wavefolder Voltage-controlled transistor wavefolder with built-in VCA Slope Voltage-controlled slew limiter, envelope and looping LFO Quantizer Programmable CV quantizer (ATmega328P) Dual VCA Dual linear VCA with mixer (AS3360) Quad Attenuverter/Mixer Four attenuverters normalled to a summing mixer

More envelope modules

Stages Mutable Instruments Peaks Mutable Instruments ADSR diysynth Cycling Envelope Generator diysynth Looping A-R diysynth Sigma Voxmachina EG Super Synthesis ADSR CubuSynth

This is a third-party open-source design, listed here as a build reference. Specs are researched from public sources; check the source repo and store for the current BOM, panel, and revision before ordering parts. Corrections welcome.

← Back to all builds Suggest a correction or a missing module