This is an all analog synthesizer module with four channels of envelope generation. Each envelope generator has a single input, output and decay knob. This is the same envelope generator circuit as used on BMC18. It's useful for creating percussive sounds.

Demos, build documentation, drill guide, are available here.

Unfinished panels are drilled by hand in my garage, they are bare aluminum that may be scratched.  They are intended to be painted, etched or otherwise finished later.

Pre-Assembled Modules are built after the order comes in.  Build time can be a few days or a few weeks depending on what parts I have on hand.  When ordering, please leave a comment at checkout if you have preferences on what color(s) the panel is painted.