Based on the EF in the Buchla Easel

Based on the EF in the Buchla Easel

This module is based on the EF found in the Buchla Easel. The main differences being a gain pot rather than a hi/lo switch and a comparator stage to give a gate output. The 1/4” jack is connected to the switch of the 3.5mm input jack.

Otherwise this is an easy module to use, plug in a microphone or guitar or whatever, adjust the gain pot so the LED comes on when you speak or play. Patch the outputs to wherever you want.

https://www.nonlinearcircuits.com/modules/p/4hp-envelope-follower